Information sending and receiving methods and devices

ABSTRACT

Embodiments of the present invention provide information sending and receiving methods and devices. The information sending method includes: determining, by a base station, a downlink subframe that is used to send first information to user equipment UE; and sending, by the base station, the first information to the UE by using the downlink subframe, where the downlink subframe is a first subframe, a second subframe, or a third subframe, where the first subframe includes at least two sub-physical resource block pairs, the second subframe includes at least two physical resource block pairs, and the third subframe includes at least one sub-physical resource block pair and at least one physical resource block pair. According to the embodiments of the present invention, an LTE communications system efficiently and flexibly supports various network architectures and various types of UEs.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.16/382,988, filed on Apr. 12, 2019, which is a continuation of U.S.patent application Ser. No. 15/015,430, filed on Feb. 4, 2016, now U.S.Pat. No. 10,278,170, which is a continuation of International PatentApplication No. PCT/CN2013/080978, filed on Aug. 7, 2013. All of theafore-mentioned patent applications are hereby incorporated by referencein their entireties.

TECHNICAL FIELD

Embodiments of the present invention relate to communicationstechnologies, and in particular, to information sending and receivingmethods and devices.

BACKGROUND

Currently, releases of a Long Term Evolution (LTE) communications systemapplied to a base station or user equipment (UE) include Release 8,Release 9, Release 10, Release 11, Release 12, and the like.

LTE communications systems of different releases are corresponding todifferent network architectures, for example, in a current LTEcommunications system, such as an LTE communications system of Release 8or 9, deployment is performed mainly for a scenario in which there arehomogeneous cells, that is, deployment is performed for a scenario inwhich a macro cell is mainly involved. A large quantity of heterogeneousnetworks are used for deployment in LTE communications systems startingfrom an LTE communications system of the Release 10, that is, deploymentis performed by combining a macro cell and a micro cell. Withdevelopment of the LTE communications systems, a channel propagationcondition increasingly deteriorates, a large quantity of frequencyspectrums of a high frequency band and even a super high frequency bandwill be used, such as 3.5 G Hertz, and even ten to tens of gigahertz.Under such a channel propagation condition, due to an increase inDoppler spread, a loss of a signal is great and interference betweensubcarriers increases.

For a UE, the UE can support one or more LTE systems, and to meetrequirements of various communications application scenarios, UEs mayfurther be classified into types of UEs according to specific functionsof the UEs, for example, a UE used for processing a common data serviceor voice service, a machine-type UE used for processing data of a smallamount, a UE used for processing a latency-sensitive service, and a UEused for receiving a broadcast service.

However, LTE communications systems of various releases in the prior artcannot efficiently and flexibly support multiple types of networkarchitectures, cannot efficiently and flexibly support various channelpropagation conditions, and cannot support multiple types of UEs.

SUMMARY

Embodiments of the present invention provide information sending andreceiving methods and devices, so that an LTE communications systemefficiently and flexibly supports various network architectures andvarious types of UEs.

According to a first aspect, an embodiment of the present inventionprovides an information sending method, including:

determining, by a base station, a downlink subframe that is used to sendfirst information to user equipment UE; and

sending, by the base station, the first information to the UE by usingthe downlink subframe, where

the downlink subframe is a first subframe, a second subframe, or a thirdsubframe, where the first subframe includes at least two sub-physicalresource block pairs, the second subframe includes at least two physicalresource block pairs, and the third subframe includes at least onesub-physical resource block pair and at least one physical resourceblock pair.

With reference to the first aspect, in a first possible implementationmanner of the first aspect, a length of a time domain occupied by thesub-physical resource block pair is less than a length of a time domainoccupied by the first subframe, and the sub-physical resource block pairincludes N1 first subcarriers and M1 first orthogonal frequency divisionmultiplexing OFDM symbols, where a spacing between two adjacent firstsubcarriers in a frequency domain is greater than a set value, and bothN1 and M1 are positive integers.

With reference to the first possible implementation manner of the firstaspect, in a second possible implementation manner of the first aspect,a length of a time domain occupied by the physical resource block pairis equal to a length of a time domain occupied by the second subframe,and the physical resource block pair includes N2 second subcarriers andM2 second OFDM symbols, where a spacing between two adjacent secondsubcarriers in the frequency domain is equal to the set value, and bothN2 and M2 are positive integers.

With reference to the second possible implementation manner of the firstaspect, in a third possible implementation manner of the first aspect,N1 is equal to N2, and M1 is equal to M2.

With reference to the second or the third possible implementation mannerof the first aspect, in a fourth possible implementation manner of thefirst aspect, the at least one physical resource block pair in the thirdsubframe occupies a first frequency band, and the at least onesub-physical resource block pair in the third subframe occupies a secondfrequency band, where the first frequency band and the second frequencyband do not overlap.

With reference to the first aspect or any one of the first to the fourthpossible implementation manners of the first aspect, in a fifth possibleimplementation manner of the first aspect, before the sending, by thebase station, the first information to the UE by using the downlinksubframe, the method further includes:

sending, by the base station, a subframe type indication to the UE,where the subframe type indication is used to indicate that the downlinksubframe is the first subframe, the second subframe, or the thirdsubframe.

With reference to the fourth or the fifth possible implementation mannerof the first aspect, in a sixth possible implementation manner of thefirst aspect, when the downlink subframe is the third subframe, beforethe sending, by the base station, the first information to the UE byusing the downlink subframe, the method further includes:

sending, by the base station, a frequency band indication to the UE,where the frequency band indication is used to indicate that the atleast one physical resource block pair occupies the first frequencyband, and the at least one sub-physical resource block pair occupies thesecond frequency band.

With reference to the sixth possible implementation manner of the firstaspect, in a seventh possible implementation manner of the first aspect,the sending, by the base station, the first information to the UE byusing the downlink subframe includes:

sending, by the base station, the physical resource block pair on thefirst frequency band to the UE by using a first cyclic prefix CP length,where the physical resource block pair on the first frequency bandcarries the first information; or

sending, by the base station, the sub-physical resource block pair onthe second frequency band to the UE by using a second CP length, wherethe sub-physical resource block pair on the second frequency bandcarries the first information, where

the first CP length is different from the second CP length.

With reference to the first aspect or any one of the first to theseventh possible implementation manners of the first aspect, in aneighth possible implementation manner of the first aspect, the firstinformation includes:

control information for scheduling a downlink data channel and downlinkdata carried by the downlink data channel; or

control information for scheduling an uplink data channel.

With reference to the eighth possible implementation manner of the firstaspect, in a ninth possible implementation manner of the first aspect,the control information for scheduling the downlink data channelincludes a resource allocation indication of the downlink data channel,and the resource allocation indication of the downlink data channel isused to indicate a location of the physical resource block pair that isin the downlink subframe and that is allocated to the UE and a quantityof the physical resource block pairs, or the resource allocationindication of the downlink data channel is used to indicate a locationof the sub-physical resource block pair that is in the downlink subframeand that is allocated to the UE and a quantity of the sub-physicalresource block pairs; or

the control information for scheduling the uplink data channel includesa resource allocation indication of the uplink data channel, and theresource allocation indication of the uplink data channel is used toindicate a location of a physical resource block pair that is in anuplink subframe and that is allocated to the UE and a quantity of thephysical resource block pairs, or the resource allocation indication ofthe uplink data channel is used to indicate a location of thesub-physical resource block pair that is in an uplink subframe and thatis allocated to the UE and a quantity of the sub-physical resource blockpairs.

With reference to the ninth possible implementation manner of the firstaspect, in a tenth possible implementation manner of the first aspect,the control information for scheduling the downlink data channel furtherincludes a modulation and coding scheme, and the modulation and codingscheme is used to indicate a transport block size of the downlink datachannel; or

the control information for scheduling the uplink data channel furtherincludes a modulation and coding scheme, and the modulation and codingscheme is used to indicate a transport block size of the uplink datachannel.

According to a second aspect, an embodiment of the present inventionprovides an information receiving method, including:

determining, by user equipment UE, a downlink subframe that carriesfirst information and that is sent by a base station; and

receiving, by the UE, the first information by using the downlinksubframe, where

the downlink subframe is any one of a first subframe, a second subframe,or a third subframe, where the first subframe includes at least twosub-physical resource block pairs, the second subframe includes at leasttwo physical resource block pairs, and the third subframe includes atleast one sub-physical resource block pair and at least one physicalresource block pair.

With reference to the second aspect, in a first possible implementationmanner of the second aspect, a length of a time domain occupied by thesub-physical resource block pair is less than a length of a time domainoccupied by the first subframe, and the sub-physical resource block pairincludes N1 first subcarriers and M1 first orthogonal frequency divisionmultiplexing OFDM symbols, where a spacing between two adjacent firstsubcarriers in a frequency domain is greater than a set value, and bothN1 and M1 are positive integers.

With reference to the first possible implementation manner of the secondaspect, in a second possible implementation manner of the second aspect,a length of a time domain occupied by the physical resource block pairis equal to a length of a time domain occupied by the second subframe,and the physical resource block pair includes N2 second subcarriers andM2 second OFDM symbols, where a spacing between two adjacent secondsubcarriers in the frequency domain is equal to the set value, and bothN2 and M2 are positive integers.

With reference to the second possible implementation manner of thesecond aspect, in a third possible implementation manner of the secondaspect, N1 is equal to N2, and M1 is equal to M2.

With reference to the second or the third possible implementation mannerof the second aspect, in a fourth possible implementation manner of thesecond aspect, the at least one physical resource block pair in thethird subframe occupies a first frequency band, and the at least onesub-physical resource block pair in the third subframe occupies a secondfrequency band, where the first frequency band and the second frequencyband do not overlap.

With reference to the second aspect or any one of the first to thefourth possible implementation manners of the second aspect, in a fifthpossible implementation manner of the second aspect, the determining, bya UE, a downlink subframe that carries first information and that issent by a base station includes:

receiving, by the UE, a subframe type indication sent by the basestation, where the subframe type indication is used to indicate that thedownlink subframe is the first subframe, the second subframe, or thethird subframe.

With reference to the fourth or the fifth possible implementation mannerof the second aspect, in a sixth possible implementation manner of thesecond aspect, when the downlink subframe is the third subframe, beforethe receiving, by the UE, the first information by using the downlinksubframe, the method further includes:

receiving, by the UE, a frequency band indication sent by the basestation, where the frequency band indication is used to indicate thatthe at least one physical resource block pair occupies the firstfrequency band, and the at least one sub-physical resource block pairoccupies the second frequency band.

With reference to the sixth possible implementation manner of the secondaspect, in a seventh possible implementation manner of the secondaspect, the receiving, by the UE, the first information by using thedownlink subframe includes:

receiving, by the UE, the physical resource block pair that is on thefirst frequency band and that is sent by the base station by using afirst cyclic prefix CP length, where the physical resource block pair onthe first frequency band carries the first information; or

receiving, by the UE, the sub-physical resource block pair that is onthe second frequency band and that is sent by the base station by usinga second CP length, where the sub-physical resource block pair on thesecond frequency band carries the first information, where

the first CP length is different from the second CP length.

With reference to the second aspect or any one of the first to theseventh possible implementation manners of the second aspect, in aneighth possible implementation manner of the second aspect, the firstinformation includes:

control information for scheduling a downlink data channel and downlinkdata carried by the downlink data channel; or

control information for scheduling an uplink data channel.

With reference to the eighth possible implementation manner of thesecond aspect, in a ninth possible implementation manner of the secondaspect, the control information for scheduling the downlink data channelincludes a resource allocation indication of the downlink data channel,and the resource allocation indication of the downlink data channel isused to indicate a location of the physical resource block pair that isin the downlink subframe and that is allocated to the UE and a quantityof the physical resource block pairs, or the resource allocationindication of the downlink data channel is used to indicate a locationof the sub-physical resource block pair that is in the downlink subframeand that is allocated to the UE and a quantity of the sub-physicalresource block pairs; or

the control information for scheduling the uplink data channel includesa resource allocation indication of the uplink data channel, and theresource allocation indication of the uplink data channel is used toindicate a location of a physical resource block pair that is in anuplink subframe and that is allocated to the UE and a quantity of thephysical resource block pairs, or the resource allocation indication ofthe uplink data channel is used to indicate a location and a quantity ofthe sub-physical resource block pairs that is in an uplink subframe andthat is allocated to the UE.

With reference to the ninth possible implementation manner of the secondaspect, in a tenth possible implementation manner of the second aspect,the control information for scheduling the downlink data channel furtherincludes a modulation and coding scheme, and the modulation and codingscheme is used to indicate a transport block size of the downlink datachannel; or

the control information for scheduling the uplink data channel furtherincludes a modulation and coding scheme, and the modulation and codingscheme is used to indicate a transport block size of the uplink datachannel.

According to a third aspect, an embodiment of the present inventionprovides an information sending method, including:

determining, by a base station, rate matching information, and sendingthe rate matching information to user equipment UE, where the ratematching information is used to indicate a first time-frequency resourcethat is in a downlink subframe and that does not need to be detected bythe UE when the UE receives second information by using the downlinksubframe; and

determining, by the base station, the downlink subframe according to therate matching information, and sending the downlink subframe to the userequipment, where the downlink subframe includes at least two subframes.

With reference to the third aspect, in a first possible implementationmanner of the third aspect, the first time-frequency resource includesall time-frequency resources included in at least one subframe; or

the first time-frequency resource includes at least one of a physicalresource block, a sub-physical resource block, a physical resource blockpair, and a sub-physical resource block pair; or

the first time-frequency resource includes at least one of a resourceelement, a resource element group, and a control channel element; or

the first time-frequency resource includes a resource pattern of areference signal.

With reference to the first possible implementation manner of the thirdaspect, in a second possible implementation manner of the third aspect,a length of a time domain occupied by the sub-physical resource blockpair is less than a length of a time domain occupied by one subframe,and the sub-physical resource block pair includes N1 first subcarriersand M1 first orthogonal frequency division multiplexing OFDM symbols,where a spacing between two adjacent first subcarriers in a frequencydomain is greater than a set value, and both N1 and M1 are positiveintegers.

With reference to the second possible implementation manner of the thirdaspect, in a third possible implementation manner of the third aspect, alength of a time domain occupied by the physical resource block pair isequal to a length of a time domain occupied by one subframe, and thephysical resource block pair includes N2 second subcarriers and M2second OFDM symbols, where a spacing between two adjacent secondsubcarriers in the frequency domain is equal to the set value, and bothN2 and M2 are positive integers.

With reference to the third possible implementation manner of the thirdaspect, in a fourth possible implementation manner of the third aspect,N1 is equal to N2, and M1 is equal to M2.

With reference to the third or the fourth possible implementation mannerof the third aspect, in a fifth possible implementation manner of thethird aspect, the physical resource block pair occupies a firstfrequency band, and the sub-physical resource block pair occupies asecond frequency band, where the first frequency band and the secondfrequency band do not overlap.

With reference to the third aspect or any one of the first to the fifthpossible implementation manners of the third aspect, in a sixth possibleimplementation manner of the third aspect, the sending, by a basestation, the rate matching information to user equipment UE includes:

sending, by the base station, the rate matching information to the UE byusing layer 1 signaling or layer 2 signaling.

With reference to the third aspect or any one of the first to the sixthpossible implementation manners of the third aspect, in a seventhpossible implementation manner of the third aspect, a downlink subframecorresponding to the first time-frequency resource is a paging subframeor a synchronization signal sending subframe.

With reference to the third aspect or any one of the first to theseventh possible implementation manners of the third aspect, in aneighth possible implementation manner of the third aspect, the methodfurther includes:

sending, by the base station, a configuration message to the UE, wherethe configuration message includes at least one of uplink schedulinginformation, uplink power control information, and periodic uplinksignal configuration information, and the configuration message is usedto instruct the UE to send an uplink signal in an uplink subframeaccording to the configuration message, where the uplink subframe is anuplink subframe corresponding to the downlink subframe in which thefirst time-frequency resource is located.

According to a fourth aspect, an embodiment of the present inventionprovides an information receiving method, including:

receiving, by user equipment UE, rate matching information sent by abase station, where the rate matching information is used to indicate afirst time-frequency resource that is in a downlink subframe and thatdoes not need to be detected by the UE when the UE receives secondinformation by using the downlink subframe; and

receiving, by the UE according to the rate matching information, thesecond information carried in the downlink subframe, where the downlinksubframe includes at least two subframes.

With reference to the fourth aspect, in a first possible implementationmanner of the fourth aspect, the first time-frequency resource includesall time-frequency resources included in at least one subframe; or

the first time-frequency resource includes at least one of a physicalresource block, a sub-physical resource block, a physical resource blockpair, and a sub-physical resource block pair; or

the first time-frequency resource includes at least one of a resourceelement, a resource element group, and a control channel element; or

the first time-frequency resource includes a resource pattern of areference signal.

With reference to the first possible implementation manner of the fourthaspect, in a second possible implementation manner of the fourth aspect,a length of a time domain occupied by the sub-physical resource blockpair is less than a length of a time domain occupied by one subframe,and the sub-physical resource block pair includes N1 first subcarriersand M1 first orthogonal frequency division multiplexing OFDM symbols,where a spacing between two adjacent first subcarriers in a frequencydomain is greater than a set value, and both N1 and M1 are positiveintegers.

With reference to the second possible implementation manner of thefourth aspect, in a third possible implementation manner of the fourthaspect, a length of a time domain occupied by the physical resourceblock pair is equal to a length of a time domain occupied by onesubframe, and the physical resource block pair includes N2 secondsubcarriers and M2 second OFDM symbols, where a spacing between twoadjacent second subcarriers in the frequency domain is equal to the setvalue, and both N2 and M2 are positive integers.

With reference to the third possible implementation manner of the fourthaspect, in a fourth possible implementation manner of the fourth aspect,N1 is equal to N2, and M1 is equal to M2.

With reference to the third or the fourth possible implementation mannerof the fourth aspect, in a fifth possible implementation manner of thefourth aspect, the physical resource block pair occupies a firstfrequency band, and the sub-physical resource block pair occupies asecond frequency band, where the first frequency band and the secondfrequency band do not overlap.

With reference to the fourth aspect or any one of the first to the fifthpossible implementation manners of the fourth aspect, in a sixthpossible implementation manner of the fourth aspect, the receiving, byuser equipment UE, rate matching information sent by a base stationincludes:

receiving, by the UE by using layer 1 signaling or layer 2 signaling,the rate matching information sent by the base station.

With reference to the fourth aspect or any one of the first to the sixthpossible implementation manners of the fourth aspect, in a seventhpossible implementation manner of the fourth aspect, a downlink subframecorresponding to the first time-frequency resource is a paging subframeor a synchronization signal sending subframe.

With reference to the fourth aspect or any one of the first to theseventh possible implementation manners of the fourth aspect, in aneighth possible implementation manner of the fourth aspect, the methodfurther includes:

receiving, by the UE, a configuration message sent by the base station,where the configuration message includes at least one of uplinkscheduling information, uplink power control information, and periodicuplink signal configuration information; and

sending, by the UE, an uplink signal in an uplink subframe according tothe configuration message, where the uplink subframe is an uplinksubframe corresponding to the downlink subframe in which the firsttime-frequency resource is located.

According to a fifth aspect, an embodiment of the present inventionprovides a base station, including:

a subframe determining module, configured to determine a downlinksubframe that is used to send first information to user equipment UE;and

a first sending module, configured to send the first information to theUE by using the downlink subframe, where

the downlink subframe is a first subframe, a second subframe, or a thirdsubframe, where the first subframe includes at least two sub-physicalresource block pairs, the second subframe includes at least two physicalresource block pairs, and the third subframe includes at least onesub-physical resource block pair and at least one physical resourceblock pair.

With reference to the fifth aspect, in a first possible implementationmanner of the fifth aspect, a length of a time domain occupied by thesub-physical resource block pair is less than a length of a time domainoccupied by the first subframe, and the sub-physical resource block pairincludes N1 first subcarriers and M1 first orthogonal frequency divisionmultiplexing OFDM symbols, where a spacing between two adjacent firstsubcarriers in a frequency domain is greater than a set value, and bothN1 and M1 are positive integers.

With reference to the first possible implementation manner of the fifthaspect, in a second possible implementation manner of the fifth aspect,a length of a time domain occupied by the physical resource block pairis equal to a length of a time domain occupied by the second subframe,and the physical resource block pair includes N2 second subcarriers andM2 second OFDM symbols, where a spacing between two adjacent secondsubcarriers in the frequency domain is equal to the set value, and bothN2 and M2 are positive integers.

With reference to the second possible implementation manner of the fifthaspect, in a third possible implementation manner of the fifth aspect,N1 is equal to N2, and M1 is equal to M2.

With reference to the second or the third possible implementation mannerof the fifth aspect, in a fourth possible implementation manner of thefifth aspect, the at least one physical resource block pair in the thirdsubframe occupies a first frequency band, and the at least onesub-physical resource block pair in the third subframe occupies a secondfrequency band, where the first frequency band and the second frequencyband do not overlap.

With reference to the fifth aspect or any one of the first to fourthpossible implementation manners of the fifth aspect, in a fifth possibleimplementation manner of the fifth aspect, the base station furtherincludes:

a second sending module, configured to send a subframe type indicationto the UE before the first information is sent to the UE by using thedownlink subframe, where the subframe type indication is used toindicate that the downlink subframe is the first subframe, the secondsubframe, or the third subframe.

With reference to the fourth or the fifth possible implementation mannerof the fifth aspect, in a sixth possible implementation manner of thefifth aspect, the base station further includes:

a third sending module, configured to: when the downlink subframe is thethird subframe, send a frequency band indication to the UE before thefirst information is sent to the UE by using the downlink subframe,where the frequency band indication is used to indicate that the atleast one physical resource block pair occupies the first frequencyband, and the at least one sub-physical resource block pair occupies thesecond frequency band.

With reference to the sixth possible implementation manner of the fifthaspect, in a seventh possible implementation manner of the fifth aspect,the first sending module is specifically configured to:

send the physical resource block pair on the first frequency band to theUE by using a first cyclic prefix CP length, where the physical resourceblock pair on the first frequency band carries the first information; or

send the sub-physical resource block pair on the second frequency bandto the UE by using a second CP length, where the sub-physical resourceblock pair on the second frequency band carries the first information,where

the first CP length is different from the second CP length.

With reference to the fifth aspect or any one of the first to theseventh possible implementation manners of the fifth aspect, in aneighth possible implementation manner of the fifth aspect, the firstinformation includes:

control information for scheduling a downlink data channel and downlinkdata carried by the downlink data channel; or

control information for scheduling an uplink data channel.

With reference to the eighth possible implementation manner of the fifthaspect, in a ninth possible implementation manner of the fifth aspect,the control information for scheduling the downlink data channelincludes a resource allocation indication of the downlink data channel,and the resource allocation indication of the downlink data channel isused to indicate a location of the physical resource block pair that isin the downlink subframe and that is allocated to the UE and a quantityof the physical resource block pairs, or the resource allocationindication of the downlink data channel is used to indicate a locationof the sub-physical resource block pair that is in the downlink subframeand that is allocated to the UE and a quantity of the sub-physicalresource block pairs; or

the control information for scheduling the uplink data channel includesa resource allocation indication of the uplink data channel, and theresource allocation indication of the uplink data channel is used toindicate a location of a physical resource block pair that is in anuplink subframe and that is allocated to the UE and a quantity of thephysical resource block pairs, or the resource allocation indication ofthe uplink data channel is used to indicate a location of thesub-physical resource block pair that is in an uplink subframe and thatis allocated to the UE and a quantity of the sub-physical resource blockpairs.

With reference to the ninth possible implementation manner of the fifthaspect, in a tenth possible implementation manner of the fifth aspect,the control information for scheduling the downlink data channel furtherincludes a modulation and coding scheme, and the modulation and codingscheme is used to indicate a transport block size of the downlink datachannel; or

the control information for scheduling the uplink data channel furtherincludes a modulation and coding scheme, and the modulation and codingscheme is used to indicate a transport block size of the uplink datachannel.

According to a sixth aspect, an embodiment of the present inventionprovides user equipment, including:

a subframe determining module, configured to determine a downlinksubframe that carries first information and that is sent by a basestation; and

a first receiving module, configured to receive the first information byusing the downlink subframe, where

the downlink subframe is any one of a first subframe, a second subframe,or a third subframe, where the first subframe includes at least twosub-physical resource block pairs, the second subframe includes at leasttwo physical resource block pairs, and the third subframe includes atleast one sub-physical resource block pair and at least one physicalresource block pair.

With reference to the sixth aspect, in a first possible implementationmanner of the sixth aspect, a length of a time domain occupied by thesub-physical resource block pair is less than a length of a time domainoccupied by the first subframe, and the sub-physical resource block pairincludes N1 first subcarriers and M1 first orthogonal frequency divisionmultiplexing OFDM symbols, where a spacing between two adjacent firstsubcarriers in a frequency domain is greater than a set value, and bothN1 and M1 are positive integers.

With reference to the first possible implementation manner of the sixthaspect, in a second possible implementation manner of the sixth aspect,a length of a time domain occupied by the physical resource block pairis equal to a length of a time domain occupied by the second subframe,and the physical resource block pair includes N2 second subcarriers andM2 second OFDM symbols, where a spacing between two adjacent secondsubcarriers in the frequency domain is equal to the set value, and bothN2 and M2 are positive integers.

With reference to the second possible implementation manner of the sixthaspect, in a third possible implementation manner of the sixth aspect,N1 is equal to N2, and M1 is equal to M2.

With reference to the second or the third possible implementation mannerof the sixth aspect, in a fourth possible implementation manner of thesixth aspect, the at least one physical resource block pair in the thirdsubframe occupies a first frequency band, and the at least onesub-physical resource block pair in the third subframe occupies a secondfrequency band, where the first frequency band and the second frequencyband do not overlap.

With reference to the sixth aspect or any one of the first to the fourthpossible implementation manners of the sixth aspect, in a fifth possibleimplementation manner of the sixth aspect, the subframe determiningmodule is specifically configured to:

receive a subframe type indication sent by the base station, where thesubframe type indication is used to indicate that the downlink subframeis the first subframe, the second subframe, or the third subframe.

With reference to the fourth or the fifth possible implementationmanners of the sixth aspect, in a sixth possible implementation mannerof the sixth aspect, the user equipment further includes a secondreceiving module, configured to: when the downlink subframe is the thirdsubframe and before the first information is received by using thedownlink subframe, receive a frequency band indication sent by the basestation, where the frequency band indication is used to indicate thatthe at least one physical resource block pair occupies the firstfrequency band, and the at least one sub-physical resource block pairoccupies the second frequency band.

With reference to the sixth possible implementation manner of the sixthaspect, in a seventh possible implementation manner of the sixth aspect,the first receiving module is specifically configured to:

receive the physical resource block pair that is on the first frequencyband and that is sent by the base station by using a first cyclic prefixCP length, where the physical resource block pair on the first frequencyband carries the first information; or

receive the sub-physical resource block pair that is on the secondfrequency band and that is sent by the base station by using a second CPlength, where the sub-physical resource block pair on the secondfrequency band carries the first information, where

the first CP length is different from the second CP length.

With reference to the sixth aspect or any one of the first to theseventh possible implementation manners of the sixth aspect, in aneighth possible implementation manner of the sixth aspect, the firstinformation includes:

control information for scheduling a downlink data channel and downlinkdata carried by the downlink data channel; or

control information for scheduling an uplink data channel.

With reference to the eighth possible implementation manner of the sixthaspect, in a ninth possible implementation manner of the sixth aspect,the control information for scheduling the downlink data channelincludes a resource allocation indication of the downlink data channel,and the resource allocation indication of the downlink data channel isused to indicate a location of the physical resource block pair that isin the downlink subframe and that is allocated to the UE and a quantityof the physical resource block pairs, or the resource allocationindication of the downlink data channel is used to indicate a locationof the sub-physical resource block pair that is in the downlink subframeand that is allocated to the UE and a quantity of the sub-physicalresource block pairs; or

the control information for scheduling the uplink data channel includesa resource allocation indication of the uplink data channel, and theresource allocation indication of the uplink data channel is used toindicate a location of a physical resource block pair that is in anuplink subframe and that is allocated to the UE and a quantity of thephysical resource block pairs, or the resource allocation indication ofthe uplink data channel is used to indicate a location and a quantity ofthe sub-physical resource block pairs that is in an uplink subframe andthat is allocated to the UE.

With reference to the ninth possible implementation manner of the sixthaspect, in a tenth possible implementation manner of the sixth aspect,the control information for scheduling the downlink data channel furtherincludes a modulation and coding scheme, and the modulation and codingscheme is used to indicate a transport block size of the downlink datachannel; or

the control information for scheduling the uplink data channel furtherincludes a modulation and coding scheme, and the modulation and codingscheme is used to indicate a transport block size of the uplink datachannel.

According to a seventh aspect, an embodiment of the present inventionprovides a base station, including:

an information determining module, configured to determine rate matchinginformation, and send the rate matching information to user equipmentUE, where the rate matching information is used to indicate a firsttime-frequency resource that is in a downlink subframe and that does notneed to be detected by the UE when the UE receives second information byusing the downlink subframe; and

a first sending module, configured to determine the downlink subframeaccording to the rate matching information, and send the downlinksubframe to the user equipment, where the downlink subframe includes atleast two subframes.

With reference to the seventh aspect, in a first possible implementationmanner of the seventh aspect, the first time-frequency resource includesall time-frequency resources included in at least one subframe; or

the first time-frequency resource includes at least one of a physicalresource block, a sub-physical resource block, a physical resource blockpair, and a sub-physical resource block pair; or

the first time-frequency resource includes at least one of a resourceelement, a resource element group, and a control channel element; or

the first time-frequency resource includes a resource pattern of areference signal.

With reference to the first possible implementation manner of theseventh aspect, in a second possible implementation manner of theseventh aspect, a length of a time domain occupied by the sub-physicalresource block pair is less than a length of a time domain occupied byone subframe, and the sub-physical resource block pair includes N1 firstsubcarriers and M1 first orthogonal frequency division multiplexing OFDMsymbols, where a spacing between two adjacent first subcarriers in afrequency domain is greater than a set value, and both N1 and M1 arepositive integers.

With reference to the second possible implementation manner of theseventh aspect, in a third possible implementation manner of the seventhaspect, a length of a time domain occupied by the physical resourceblock pair is equal to a length of a time domain occupied by onesubframe, and the physical resource block pair includes N2 secondsubcarriers and M2 second OFDM symbols, where a spacing between twoadjacent second subcarriers in the frequency domain is equal to the setvalue, and both N2 and M2 are positive integers.

With reference to the third possible implementation manner of theseventh aspect, in a fourth possible implementation manner of theseventh aspect, N1 is equal to N2, and M1 is equal to M2.

With reference to the third or the fourth possible implementation mannerof the seventh aspect, in a fifth possible implementation manner of theseventh aspect, the physical resource block pair occupies a firstfrequency band, and the sub-physical resource block pair occupies asecond frequency band, where the first frequency band and the secondfrequency band do not overlap.

With reference to the seventh aspect or any one of the first to thefifth possible implementation manners of the seventh aspect, in a sixthpossible implementation manner of the seventh aspect, the first sendingmodule is specifically configured to:

send the rate matching information to the UE by using layer 1 signalingor layer 2 signaling.

With reference to the seventh aspect or any one of the first to thesixth possible implementation manners of the seventh aspect, in aseventh possible implementation manner of the seventh aspect, a downlinksubframe corresponding to the first time-frequency resource is a pagingsubframe or a synchronization signal sending subframe.

With reference to the seventh aspect or any one of the first to seventhpossible implementation manners of the seventh aspect, in an eighthpossible implementation manner of the seventh aspect, the base stationfurther includes:

a configuration module, configured to send a configuration message tothe UE, where the configuration message includes at least one of uplinkscheduling information, uplink power control information, and periodicuplink signal configuration information, and the configuration messageis used to instruct the UE to send an uplink signal in an uplinksubframe according to the configuration message, where the uplinksubframe is an uplink subframe corresponding to the downlink subframe inwhich the first time-frequency resource is located.

According to an eighth aspect, an embodiment of the present inventionprovides user equipment, including:

a first receiving module, configured to receive rate matchinginformation sent by a base station, where the rate matching informationis used to indicate a first time-frequency resource that is in adownlink subframe and that does not need to be detected by the UE whenthe UE receives second information by using the downlink subframe; and

a second receiving module, configured to receive, according to the ratematching information, the second information carried in the downlinksubframe, where the downlink subframe includes at least two subframes.

With reference to the eighth aspect, in a first possible implementationmanner of the eighth aspect, the first time-frequency resource includesall time-frequency resources included in at least one subframe; or

the first time-frequency resource includes at least one of a physicalresource block, a sub-physical resource block, a physical resource blockpair, and a sub-physical resource block pair; or

the first time-frequency resource includes at least one of a resourceelement, a resource element group, and a control channel element; or

the first time-frequency resource includes a resource pattern of areference signal.

With reference to the first possible implementation manner of the eighthaspect, in a second possible implementation manner of the eighth aspect,a length of a time domain occupied by the sub-physical resource blockpair is less than a length of a time domain occupied by one subframe,and the sub-physical resource block pair includes N1 first subcarriersand M1 first orthogonal frequency division multiplexing OFDM symbols,where a spacing between two adjacent first subcarriers in a frequencydomain is greater than a set value, and both N1 and M1 are positiveintegers.

With reference to the second possible implementation manner of theeighth aspect, in a third possible implementation manner of the eighthaspect, a length of a time domain occupied by the physical resourceblock pair is equal to a length of a time domain occupied by onesubframe, and the physical resource block pair includes N2 secondsubcarriers and M2 second OFDM symbols, where a spacing between twoadjacent second subcarriers in the frequency domain is equal to the setvalue, and both N2 and M2 are positive integers.

With reference to the third possible implementation manner of the eighthaspect, in a fourth possible implementation manner of the eighth aspect,N1 is equal to N2, and M1 is equal to M2.

With reference to the third or the fourth possible implementation mannerof the eighth aspect, in a fifth possible implementation manner of theeighth aspect, the physical resource block pair occupies a firstfrequency band, and the sub-physical resource block pair occupies asecond frequency band, where the first frequency band and the secondfrequency band do not overlap.

With reference to the eighth aspect or any one of the first to the fifthpossible implementation manners of the eighth aspect, in a sixthpossible implementation manner of the eighth aspect, the first receivingmodule is specifically configured to:

receive, by using layer 1 signaling or layer 2 signaling, the ratematching information sent by the base station.

With reference to the eighth aspect or any one of the first to the sixthpossible implementation manners of the eighth aspect, in a seventhpossible implementation manner of the eighth aspect, a downlink subframecorresponding to the first time-frequency resource is a paging subframeor a synchronization signal sending subframe.

With reference to the eighth aspect or any one of the first to seventhpossible implementation manners of the eighth aspect, in an eighthpossible implementation manner of the eighth aspect, the user equipmentfurther includes:

a third receiving module, configured to receive a configuration messagesent by the base station, where the configuration message includes atleast one of uplink scheduling information, uplink power controlinformation, and periodic uplink signal configuration information; and

a sending module, configured to send an uplink signal in an uplinksubframe according to the configuration message, where the uplinksubframe is an uplink subframe corresponding to the downlink subframe inwhich the first time-frequency resource is located.

According to the information sending and receiving methods and devicesprovided in the embodiments of the present invention, a base stationdetermines a downlink subframe that is used to send first information touser equipment, and the base station sends the first information to theUE by using the downlink subframe, where the downlink subframe is afirst subframe, a second subframe, or a third subframe, where the firstsubframe includes at least two sub-physical resource block pairs, thesecond subframe includes at least two physical resource block pairs, andthe third subframe includes at least one sub-physical resource blockpair and at least one physical resource block pair, so that an LTEcommunications system can efficiently and flexibly support variousnetwork architectures and various types of UEs.

BRIEF DESCRIPTION OF DRAWINGS

To describe the technical solutions in the embodiments of the presentinvention more clearly, the following briefly introduces theaccompanying drawings required for describing the embodiments.Apparently, the accompanying drawings in the following description showmerely some embodiments of the present invention, and persons ofordinary skill in the art may still derive other drawings from theseaccompanying drawings without creative efforts.

FIG. 1 is a flowchart of Embodiment 1 of an information sending methodaccording to the present invention;

FIG. 2 is a schematic structural diagram of a first subframe accordingto an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a second subframe accordingto an embodiment of the present invention;

FIG. 4 is a flowchart of Embodiment 1 of an information receiving methodaccording to the present invention;

FIG. 5 is a flowchart of Embodiment 1 of an information sending andreceiving method according to an embodiment of the present invention;

FIG. 6 is a flowchart of Embodiment 2 of an information sending methodaccording to the present invention;

FIG. 7 is a flowchart of Embodiment 2 of an information receiving methodaccording to the present invention;

FIG. 8 is a schematic structural diagram of Embodiment 1 of a basestation according to the present invention;

FIG. 9 is a schematic structural diagram of Embodiment 2 of a basestation according to the present invention;

FIG. 10 is a schematic structural diagram of Embodiment 1 of userequipment according to the present invention;

FIG. 11 is a schematic structural diagram of Embodiment 2 of userequipment according to the present invention;

FIG. 12 is a schematic structural diagram of Embodiment 3 of a basestation according to the present invention;

FIG. 13 is a schematic structural diagram of Embodiment 4 of a basestation according to the present invention;

FIG. 14 is a schematic structural diagram of Embodiment 3 of userequipment according to the present invention;

FIG. 15 is a schematic structural diagram of Embodiment 4 of userequipment according to the present invention;

FIG. 16 is a schematic structural diagram of Embodiment 5 of a basestation according to the present invention;

FIG. 17 is a schematic structural diagram of Embodiment 5 of userequipment according to the present invention;

FIG. 18 is a schematic structural diagram of Embodiment 6 of a basestation according to the present invention; and

FIG. 19 is a schematic structural diagram of Embodiment 6 of userequipment according to the present invention.

DESCRIPTION OF EMBODIMENTS

The following clearly describes the technical solutions in theembodiments of the present invention with reference to the accompanyingdrawings in the embodiments of the present invention. Apparently, thedescribed embodiments are merely some but not all of the embodiments ofthe present invention. All other embodiments obtained by persons ofordinary skill in the art based on the embodiments of the presentinvention without creative efforts shall fall within the protectionscope of the present invention.

FIG. 1 is a flowchart of Embodiment 1 of an information sending methodaccording to the present invention. As shown in FIG. 1 , the informationsending method provided in this embodiment of the present invention maybe executed by a base station. The base station may be implemented byusing software and/or hardware. The information sending method providedin this embodiment includes the following steps:

Step 101: The base station determines a downlink subframe that is usedto send first information to user equipment UE.

Step 102: The base station sends the first information to the UE byusing the downlink subframe.

The downlink subframe is any one of a first subframe, a second subframe,or a third subframe, where the first subframe includes at least twosub-physical resource block pairs, the second subframe includes at leasttwo physical resource block pairs, and the third subframe includes atleast one sub-physical resource block pair and at least one physicalresource block pair.

LTE communications systems of different releases are corresponding todifferent network architectures, for example, in a current LTEcommunications system, such as an LTE communications system of Release 8or 9, deployment is performed mainly for a scenario in which there arehomogeneous cells, that is, deployment is performed for a scenario inwhich a macro cell is mainly involved. A coverage area of a macro cellis relatively large, and therefore, from a perspective of statistics, aquantity of UEs served in each time period or even at each moment isrelatively stable; deployment of the homogeneous cells may meet afrequency selective scheduling gain and a multi-user scheduling gain,and specific cyclic prefix (CP) overheads are maintained to resist amultipath effect.

Starting from an LTE communications system of Release 10, particularly,in an LTE communications system of Release 12 that is currently beingstandardized or even a future LTE system, a large quantity ofheterogeneous networks are deployed, that is, deployment is performed bycombining a macro cell and a micro cell, and deployment density of microcells in a macro cell is increasingly high, so as to improve a high datarate anywhere at any time. The macro cell is mainly used for maintainingcoverage, radio resource control, and mobility performance. In addition,many future frequency spectrums are high frequency bands, such as 3.5GHz or even a higher frequency band, and the high frequency bands canprovide higher bandwidth. In a mainstream deployment scenario,inter-frequency deployment of macro and micro cells is used to reduceinterference between the macro and micro cells, and intra-frequencydeployment of macro and micro cells may also be considered to improvefrequency spectrum utilization.

Therefore, in step 101, the base station needs to determine, accordingto an LTE release supported by the base station, a communications systemarchitecture, or an LTE release supported by the UE, the downlinksubframe that is used to send the first information to the UE.Optionally, the first information sent by the base station to the UEincludes control information for scheduling a downlink data channel anddownlink data carried by the downlink data channel, or controlinformation for scheduling an uplink data channel.

In step 102, the base station sends the first information to the UE byusing the downlink subframe. The base station adds data and controlinformation to the downlink subframe, so that the UE acquirescorresponding information.

Specifically, the downlink subframe in this embodiment is any one of thefirst subframe, the second subframe, or the third subframe.

The first subframe includes at least two sub-physical resource blockpairs, the second subframe includes at least two physical resource blockpairs, and the third subframe includes at least one sub-physicalresource block pair and at least one physical resource block pair.

A length of a time domain occupied by the sub-physical resource blockpair is less than a length of a time domain occupied by the firstsubframe, and the sub-physical resource block pair includes N1 firstsubcarriers and M1 first orthogonal frequency division multiplexing(OFDM) symbols, where a spacing between two adjacent first subcarriersin a frequency domain is greater than a set value, and both N1 and M1are positive integers.

A length of a time domain occupied by the physical resource block pairis equal to a length of a time domain occupied by the second subframe,and the physical resource block pair includes N2 second subcarriers andM2 second OFDM symbols, where a spacing between two adjacent secondsubcarriers in the frequency domain is equal to the set value, and bothN2 and M2 are positive integers.

Optionally, N1 is equal to N2, and M1 is equal to M2.

Optionally, the foregoing set value may be 15 KHz, 7.5 KHz, or the like.

FIG. 2 is a schematic structural diagram of a first subframe accordingto an embodiment of the present invention. In an LTE communicationssystem, one radio frame includes 10 subframes, and a length of a timedomain of each subframe is 1 ms. The first subframe is a newlyintroduced subframe whose length is also 1 ms and whose time-frequencydomain includes multiple sub-physical resource block (RB) pairs, where alength of a time domain occupied by each sub-physical resource blockpair is less than a length of a time domain of one subframe. Forexample, in FIG. 2 , a subframe of a first type includes sixsub-physical resource block pairs in terms of a frequency domain width,and includes 15 sub-physical resource block pairs (the 15 sub-physicalresource block pairs occupy the length of the time domain of onesubframe) in terms of a time domain length, that is, the sub-physicalresource block pair is a sub-physical resource block pair in twodimensions: a time domain and a frequency domain. Each sub-physicalresource block pair includes 12 subcarriers in the frequency domain, andincludes 14 OFDM symbols in the time domain. A spacing between twoadjacent subcarriers of the subframe of the first type is 250 KHz, and asymbol time is 4 microseconds, which is far less than 66.67microseconds, while a CP length is reduced to 0.76 nanosecond.

Persons skilled in the art may understand that, in a specificimplementation process, quantities of sub-physical resource block pairsin terms of a frequency domain width and a time domain length are notspecifically limited in this embodiment as long as a length of a timedomain occupied by each sub-physical resource block pair is less than alength of a time domain of a subframe.

FIG. 3 is a schematic structural diagram of a second subframe accordingto an embodiment of the present invention. The second subframe includesmultiple physical resource block pairs in a frequency domain, and eachphysical resource block pair occupies a length of a time domain of anentire subframe. As shown in FIG. 3 , the second subframe includes 100physical resource block pairs in terms of a frequency domain width, andeach physical resource block includes two timeslots. For a normal CP,one timeslot includes seven OFDM symbols, and a length of a time domainof each OFDM symbol is 66.67 microseconds; for an extended CP, onetimeslot includes six symbols, where a length of the normal CP isapproximately 5 microseconds, and a length of the extended CP isapproximately 16 microseconds. As shown in FIG. 3 , a physical resourceblock pair (RB pair) includes a timeslot 0 and a timeslot 1, and eachtimeslot includes seven OFDM symbols. The physical resource block pairoccupies 12 OFDM subcarriers in a frequency domain, where a spacingbetween subcarriers is 15 KHz, and duration of an OFDM symbol is 1/(15KHz)=66.67 microseconds.

It can be learned from embodiments shown in FIG. 2 and FIG. 3 that, aquantity of transportable resource elements (12 subcarriers, 14 OFDMsymbols) in a sub-physical resource block pair is the same as that in aphysical resource block pair, but duration of an OFDM symbol is greatlyreduced, a CP length is greatly reduced, and a spacing betweensubcarriers is significantly increased, which is more suitable fordeployment of dense micro cells at a high frequency band. Specifically,an increase in the spacing between the subcarriers may resist largerDoppler spread; a decrease of the CP length has little impact ondeployment of micro cells, but overheads are reduced; a decrease of theduration of the OFDM symbol may increase a service delay, which isbeneficial to a sensitive service, and the decrease of the duration ofthe OFDM symbol is also beneficial to interference coordination andimprovement of network power efficiency. Specifically, compared with astructure of a physical resource block, a structure of a sub-physicalresource block pair can be used to rapidly complete transmission of asame amount of data, because a minimum time scheduling granularity ofthe sub-physical resource block pair is far less than 1 ms. In this way,the micro cells can complete more services to enter a sleeping state ora closed state, and implement inter-cell interference coordination in atime division manner.

The third subframe includes the at least one sub-physical resource blockpair and the at least one physical resource block pair. For a structureof the sub-physical resource block pair in the third subframe, refer toFIG. 2 ; for a structure of the physical resource block pair in thethird subframe, refer to FIG. 3 .

Optionally, the at least one physical resource block pair in the thirdsubframe occupies a first frequency band, and the at least onesub-physical resource block pair in the third subframe occupies a secondfrequency band, where the first frequency band and the second frequencyband do not overlap.

Specifically, in the third subframe, the physical resource block pairand the sub-physical resource block pair coexist and undergomultiplexing by means of orthogonal frequency division, that is, thephysical resource block pair in the third subframe occupies the firstfrequency band, and the sub-physical resource block pair in the thirdsubframe occupies the second frequency band, where the first frequencyband and the second frequency band do not overlap.

According to the information sending method provided in this embodimentof the present invention, a base station determines a downlink subframethat is used to send information to user equipment, and the base stationsends the first information to the UE by using the downlink subframe,where the downlink subframe is a first subframe, a second subframe, or athird subframe, where the first subframe includes at least twosub-physical resource block pairs, the second subframe includes at leasttwo physical resource block pairs, and the third subframe includes atleast one sub-physical resource block pair and at least one physicalresource block pair, so that an LTE communications system canefficiently and flexibly support various network architectures andvarious types of UEs.

FIG. 4 is a flowchart of Embodiment 1 of an information receiving methodaccording to the present invention. As shown in FIG. 4 , the informationreceiving method provided in this embodiment of the present inventionmay be executed by user equipment. The user equipment may be implementedby using software and/or hardware. The information receiving methodprovided in this embodiment includes the following steps:

Step 401: The user equipment UE determines a downlink subframe thatcarries first information and that is sent by a base station.

Step 402: The UE receives the first information by using the downlinksubframe.

The downlink subframe is any one of a first subframe, a second subframe,or a third subframe, where the first subframe includes at least twosub-physical resource block pairs, the second subframe includes at leasttwo physical resource block pairs, and the third subframe includes atleast one sub-physical resource block pair and at least one physicalresource block pair.

A length of a time domain occupied by the sub-physical resource blockpair is less than a length of a time domain occupied by the firstsubframe, and the sub-physical resource block pair includes N1 firstsubcarriers and M1 first OFDM symbols, where a spacing between twoadjacent first subcarriers in a frequency domain is greater than a setvalue, and both N1 and M1 are positive integers.

A length of a time domain occupied by the physical resource block pairis equal to a length of a time domain occupied by the second subframe,and the physical resource block pair includes N2 second subcarriers andM2 second OFDM symbols, where a spacing between two adjacent secondsubcarriers in the frequency domain is equal to the set value, and bothN2 and M2 are positive integers.

N1 is equal to N2, and M1 is equal to M2.

Optionally, the foregoing set value may be 15 KHz, 7.5 KHz, or the like.

The at least one physical resource block pair in the third subframeoccupies a first frequency band, and the at least one sub-physicalresource block pair in the third subframe occupies a second frequencyband, where the first frequency band and the second frequency band donot overlap.

An application scenario of this embodiment is similar to that of theembodiment shown in FIG. 1 , and details are not described herein againin this embodiment. In step 401, the UE determines the downlink subframethat carries the first information and that is sent by the base station.Specifically, the UE receives a subframe type indication sent by thebase station, where the subframe type indication is used to indicatethat the downlink subframe is the first subframe, the second subframe,or the third subframe. In step 402, the UE receives the firstinformation by using the downlink subframe, where the first informationincludes control information for scheduling a downlink data channel anddownlink data carried by the downlink data channel; or controlinformation for scheduling an uplink data channel.

For a structure of the first subframe, refer to the embodiment shown inFIG. 2 ; details are not described herein again in this embodiment. Fora structure of the second subframe, refer to the embodiment shown inFIG. 3 ; details are not described herein again in this embodiment. Thethird subframe includes at least one sub-physical resource block pairand at least one physical resource block pair. For a structure of thesub-physical resource block pair in the third subframe, refer to FIG. 2; for a structure of the physical resource block pair in the thirdsubframe, refer to FIG. 3 ; details are not described herein again inthis embodiment.

According to the information receiving method provided in thisembodiment of the present invention, a UE determines a downlink subframethat carries first information and that is sent by a base station, andthe UE receives the first information by using the downlink subframe,where the downlink subframe is any one of a first subframe, a secondsubframe, or a third subframe, where the first subframe includes atleast two sub-physical resource block pairs, the second subframeincludes at least two physical resource block pairs, and the thirdsubframe includes at least one sub-physical resource block pair and atleast one physical resource block pair, so that an LTE communicationssystem can efficiently and flexibly support various networkarchitectures and various types of UEs.

FIG. 5 is a flowchart of Embodiment 1 of an information sending andreceiving method according to an embodiment of the present invention. Inthis embodiment, the information sending and receiving method of thepresent invention is described in detail based on the embodiments shownin FIG. 1 to FIG. 4 .

Step 501: A base station determines a downlink subframe that is used tosend first information to user equipment UE.

Step 502: The base station sends a subframe type indication to the UE,where the subframe type indication is used to indicate that the downlinksubframe is a first subframe, a second subframe, or a third subframe.

Step 503: The UE receives the subframe type indication sent by the basestation, where the subframe type indication is used to indicate that thedownlink subframe is the first subframe, the second subframe, or thethird subframe.

Step 504: The base station sends the first information to the UE byusing the downlink subframe.

Step 505: The UE receives the first information by using the downlinksubframe.

In this embodiment, step 501 is similar to step 101, and details are notdescribed herein again in this embodiment.

In step 502 and step 503, the base station sends the subframe typeindication to the UE, and the UE receives the subframe type indication,where the subframe type indication is used to indicate that the downlinksubframe is the first subframe, the second subframe, or the thirdsubframe. Persons skilled in the art may understand that, in a specificimplementation process, the base station and the UE may bepreconfigured, so that the base station and the UE prestore a specificsubframe structure of the first subframe, the second subframe, or thethird subframe. When the base station sends the subframe type indicationto the UE, the UE determines, according to the subframe type indication,that the subframe is specifically the first subframe, the secondsubframe, or the third subframe, and then receives, in a correspondingsubframe according to a structure of the subframe, information sent bythe base station.

Optionally, when the downlink subframe is the third subframe, beforestep 504, the method provided in this embodiment further includes:

sending, by the base station, a frequency band indication to the UE,where the frequency band indication is used to indicate that at leastone physical resource block pair occupies a first frequency band, and atleast one sub-physical resource block pair occupies a second frequencyband; and

receiving, by the UE, the frequency band indication sent by the basestation, where the frequency band indication is used to indicate thatthe at least one physical resource block pair occupies the firstfrequency band, and the at least one sub-physical resource block pairoccupies the second frequency band.

Correspondingly, step 504 may be implemented in the following possibleimplementation manner: sending, by the base station, the physicalresource block pair on the first frequency band to the UE by using afirst cyclic prefix CP length, where the physical resource block pair onthe first frequency band carries the first information; or

sending, by the base station, the sub-physical resource block pair onthe second frequency band to the UE by using a second CP length, wherethe sub-physical resource block pair on the second frequency bandcarries the first information.

Correspondingly, step 505 may be implemented in the following possibleimplementation manner: receiving, by the UE, the physical resource blockpair that is on the first frequency band and that is sent by the basestation by using the first cyclic prefix CP length, where the physicalresource block pair on the first frequency band carries the firstinformation; or

receiving, by the UE, the sub-physical resource block pair that is onthe second frequency band and that is sent by the base station by usingthe second CP length, where the sub-physical resource block pair on thesecond frequency band carries the first information, where

the UE receives the physical resource block pair that is on the firstfrequency band and that is sent by the base station by using the firstCP length, and the UE receives the sub-physical resource block pair thatis on the second frequency band and that is sent by the base station byusing the second CP length, where the first CP length is different fromthe second CP length.

In a specific implementation process, the base station sends thesub-physical resource block pair and the physical resource block pair ina frequency division multiplexing manner, and the UE receives referencesignals with a same configuration on a frequency band. For example, theUE receives, on a frequency band of the physical resource block pair, areference signal used for measurement, such as a cell-specific referencesignal CRS or a channel state information-reference signal CSI-RS; andreceives a broadcast signal on a frequency band of the sub-physicalresource block pair, so that measurement steps are simplified, and theUE does not need to separately receive reference signals with differentconfigurations on two frequency bands.

In addition, the physical resource block pair and the sub-physicalresource block pair undergo multiplexing on a carrier, or undergofrequency division multiplexing in a same subframe, which can improveflexibility, for example, supporting different service types, forexample, a first frequency band is used for multicast servicetransmission, and an extended CP is used; a second frequency band isused for a unicast service transmission, and a normal CP is used.

Optionally, on a basis of the embodiments shown in FIG. 1 to FIG. 5 ,the first information includes control information for scheduling adownlink data channel and downlink data carried by the downlink datachannel, or control information for scheduling an uplink data channel.

The control information for scheduling the downlink data channelincludes a resource allocation indication of the downlink data channel,where the resource allocation indication of the downlink data channel isused to indicate a location of the physical resource block pair that isin the downlink subframe and that is allocated to the UE and a quantityof the physical resource block pairs, or the resource allocationindication of the downlink data channel is used to indicate a locationof the sub-physical resource block pair that is in the downlink subframeand that is allocated to the UE and a quantity of the sub-physicalresource block pairs.

Alternatively, the control information for scheduling the uplink datachannel includes a resource allocation indication of the uplink datachannel, where the resource allocation indication of the uplink datachannel is used to indicate a location of a physical resource block pairthat is in an uplink subframe and that is allocated to the UE and aquantity of the physical resource block pairs, or the resourceallocation indication of the uplink data channel is used to indicate alocation of the sub-physical resource block pair that is in an uplinksubframe and that is allocated to the UE and a quantity of thesub-physical resource block pairs.

Specifically, the control information for scheduling the downlink datachannel and the control information for scheduling the uplink datachannel may be collectively referred to as control information, and thedownlink data channel and the uplink data channel may be collectivelyreferred to as a data channel. Persons skilled in the art may understandthat, for the control information, the base station may send the controlinformation in search space, and the user equipment acquires specificcontrol information from the search space in a blind detection manner.

Further, the control information for scheduling the downlink datachannel further includes a modulation and coding scheme, where themodulation and coding scheme is used to indicate a transport block sizeof the downlink data channel; or

the control information for scheduling the uplink data channel furtherincludes a modulation and coding scheme, where the modulation and codingscheme is used to indicate a transport block size of the uplink datachannel.

Optionally, the control information further includes a modulation andcoding scheme, and the resource allocation indication is used toindicate the location of the physical resource block pair that is in thedownlink subframe and that is allocated to the UE, so that the UEdetermines a transport block size of the data channel according to themodulation and coding scheme and a quantity of physical resource blockpairs carried at the location of the physical resource block pair, andreceives the downlink data or sends uplink data according to thetransport block size.

Alternatively, specifically, the UE searches a table according to theresource allocation indication and the modulation and coding scheme todetermine a current transport block size, and finally, decodes thedownlink data according to the transport block size. In this embodiment,a quantity of resource elements of the sub-physical resource block pairis consistent with a quantity of resource elements of the physicalresource block pair (N1 is equal to N2, and M1 is equal to M2), andtherefore, a transport block size mapping table corresponding to samephysical resource block pairs may be searched according to resourceallocation and a modulation and coding scheme that are of atwo-dimensional sub-physical resource block pair, which can ensure thatan original mapping table is used, and only a manner of searching atable is changed, thereby simplifying system design reducingimplementation complexity, that is, a new transport block value and anew table do not need to be designed.

FIG. 6 is a flowchart of Embodiment 2 of an information sending methodaccording to the present invention. As shown in FIG. 6 , the informationsending method provided in this embodiment of the present invention maybe executed by a base station. The base station may be implemented byusing software and/or hardware. The information sending method providedin this embodiment includes the following steps:

Step 601: The base station determines rate matching information, andsends the rate matching information to user equipment UE, where the ratematching information is used to indicate a first time-frequency resourcethat is in a downlink subframe and that does not need to be detected bythe UE when the UE receives second information by using the downlinksubframe.

Step 602: The base station determines the downlink subframe according tothe rate matching information, and sends the downlink subframe to theuser equipment, where the downlink subframe includes at least twosubframes.

An application scenario of this embodiment is similar to an applicationscenario of the embodiment shown in FIG. 1 , and details are notdescribed herein again in this embodiment.

Specifically, when a new first time-frequency resource is introducedinto an LTE system of a higher release or an LTE system of a futurerelease, the LTE system of a higher release or the LTE system of afuture release supports forward compatibility. That is, if the new firsttime-frequency resource is introduced into the LTE system of a higherrelease or the LTE system of a future release, the LTE system of ahigher release or the LTE system of a future release may also provideefficient support for a UE of an old release. In this embodiment, thenew first time-frequency resource is avoided by configuring ratematching information for the UE of an old release, so that the LTEsystem of a future release does not affect the UE of an old release, anda specific implementation process is as follows:

In step 601, the base station needs to determine the rate matchinginformation according to an LTE release supported by the base station, acommunications system architecture, or an LTE release supported by theUE, and send the rate matching information to the user equipment, wherethe rate matching information is used to indicate the firsttime-frequency resource that is in the downlink subframe and that doesnot need to be detected by the UE when the UE receives the secondinformation by using the downlink subframe. A downlink subframecorresponding to the first time-frequency resource is a paging subframeor a synchronization signal sending subframe. Specifically, the basestation sends the rate matching information to the UE by using layer 1signaling or layer 2 signaling.

In step 602, the base station determines the downlink subframe accordingto the rate matching information, and sends the downlink subframe to theuser equipment, where the downlink subframe includes at least twosubframes.

According to the information sending method provided in this embodiment,a base station determines rate matching information, and sends the ratematching information to a UE, where the rate matching information isused to indicate a first time-frequency resource that is in a downlinksubframe and that does not need to be detected by the UE when the UEreceives second information by using the downlink subframe; and the basestation determines the downlink subframe according to the rate matchinginformation, and sends the downlink subframe to the user equipment,where the downlink subframe includes at least two subframes, so that anLTE system of a higher release or an LTE system of a future release canalso provide efficient support for a UE of an old release, and an LTEcommunications system can efficiently and flexibly support variousnetwork architectures and various types of UEs.

FIG. 7 is a flowchart of Embodiment 2 of an information receiving methodaccording to the present invention. As shown in FIG. 7 , the informationreceiving method provided in this embodiment of the present inventionmay be executed by user equipment. The user equipment may be implementedby using software and/or hardware. The information receiving methodprovided in this embodiment includes the following steps:

Step 701: The user equipment UE receives rate matching information sentby a base station, where the rate matching information is used toindicate a first time-frequency resource that is in a downlink subframeand that does not need to be detected by the UE when the UE receivessecond information by using the downlink subframe.

Step 702: The UE receives, according to the rate matching information,the second information carried in the downlink subframe, where thedownlink subframe includes at least two subframes.

An application scenario of this embodiment is similar to that of theembodiment shown in FIG. 6 , and details are not described herein againin this embodiment.

In a specific implementation process, the UE receives, by using layer 1signaling or layer 2 signaling, the rate matching information sent bythe base station. When the downlink subframe sent by the base station isreceived according to the rate matching information, not all firsttime-frequency resources in the downlink subframe are detected, but someof the first time-frequency resources are neither detected nor received,that is, some of the first time-frequency resources are skipped. Thefirst time-frequency resources skipped by the UE may be specificallyfirst time-frequency resources that are not supported by an LTE releasesupported by the UE, and a downlink subframe corresponding to the firsttime-frequency resource is a paging subframe or a synchronization signalsending subframe.

According to the information receiving method provided in thisembodiment, user equipment UE receives rate matching information sent bya base station, where the rate matching information is used to indicatea first time-frequency resource that is in a downlink subframe and thatdoes not need to be detected by the UE when the UE receives secondinformation by using the downlink subframe; and the UE receives,according to the rate matching information, the second informationcarried in the downlink subframe, where the downlink subframe includesat least two subframes, so that a UE of an old release can be used in anLTE system of a higher release or an LTE system of a future release, andan LTE communications system can also efficiently and flexibly supportvarious network architectures and various types of UEs.

On a basis of the foregoing embodiments shown in FIG. 6 and FIG. 7 ,there are multiple possible implementation manners for the firsttime-frequency resource, and the multiple possible implementationmanners are specifically as follows:

In a possible implementation manner, the first time-frequency resourceincludes all time-frequency resources included in at least one subframe.

In another possible implementation manner, the first time-frequencyresource includes at least one of a physical resource block, asub-physical resource block, a physical resource block pair, and asub-physical resource block pair.

Optionally, a length of a time domain occupied by the sub-physicalresource block pair is less than a length of a time domain occupied byone subframe, and the sub-physical resource block pair includes N1 firstsubcarriers and M1 first OFDM symbols, where a spacing between twoadjacent first subcarriers in a frequency domain is greater than a setvalue, and both N1 and M1 are positive integers.

A length of a time domain occupied by the physical resource block pairis equal to a length of a time domain occupied by one subframe, and thephysical resource block pair includes N2 second subcarriers and M2second OFDM symbols, where a spacing between two adjacent secondsubcarriers in the frequency domain is equal to the set value, and bothN2 and M2 are positive integers.

N1 is equal to N2, and M1 is equal to M2.

The physical resource block pair occupies a first frequency band, andthe sub-physical resource block pair occupies a second frequency band,where the first frequency band and the second frequency band do notoverlap.

For a specific implementation manner of the sub-physical resource blockpair, refer to the embodiment shown in FIG. 2 ; for a specificimplementation manner of the physical resource block pair, refer to theembodiment shown in FIG. 3 .

In still another possible implementation manner, the firsttime-frequency resource includes at least one of a resource element, aresource element group, and a control channel element.

Specifically, the resource element is a subcarrier in an OFDM symbol,that is, a minimum resource unit; the resource element group includesseveral resource elements, where the several resource elements may beconsecutive or inconsecutive; the control channel element is a minimumunit of a control channel, such as a physical downlink control channel(PDCCH), or an enhanced physical downlink control channel (EPDCCH), andone control channel element may include several resource element groups.

In another possible implementation manner, the first time-frequencyresource includes a resource pattern of a reference signal.

Specifically, the resource pattern reference signal may be a resourceoccupied by a cell-specific reference signal, a channel stateinformation-reference signal, a synchronize sequence, a UE-specificreference signal, or the like in current LTE.

On a basis of the foregoing embodiment, the base station sends aconfiguration message to the UE, and the UE receives the configurationmessage sent by the base station, where the configuration messageincludes at least one of uplink scheduling information, uplink powercontrol information, and periodic uplink signal configurationinformation; and the UE sends an unlink signal in an uplink subframeaccording to the configuration message, where the uplink subframe is anuplink subframe corresponding to the downlink subframe in which thefirst time-frequency resource is located.

Specifically, the first time-frequency resource in the downlink subframecannot be used by the UE, that is, the subframe needs to be skipped;however, an uplink subframe corresponding to the downlink subframe maybe configured for the UE to send an uplink signal, that is, the uplinksubframe and the downlink subframe are used independently, and skippingof the downlink subframe does not affect using of the uplink subframecorresponding to the downlink subframe. A correspondence herein may be acorrespondence between an uplink subframe and a downlink subframe thatare corresponding to a time sequence relationship between downlink dataand uplink acknowledgement (Acknowledge, ACK)/negative acknowledgement(Not Acknowledge, NACK) corresponding to the downlink data, or may be anuplink subframe and a downlink subframe that are corresponding to a timesequence relationship between uplink data and downlink ACK/NACKcorresponding to the uplink data, or may include a correspondencebetween another uplink subframe and another downlink subframe, which isnot limited herein.

FIG. 8 is a schematic structural diagram of Embodiment 1 of a basestation 80 according to the present invention. As shown in FIG. 8 , thebase station 80 provided in this embodiment of the present inventionincludes a subframe determining module 801 and a first sending module802.

The subframe determining module 801 is configured to determine adownlink subframe that is used to send first information to userequipment UE.

The first sending module 802 is configured to send the first informationto the UE by using the downlink subframe.

The downlink subframe is a first subframe, a second subframe, or a thirdsubframe, where the first subframe includes at least two sub-physicalresource block pairs, the second subframe includes at least two physicalresource block pairs, and the third subframe includes at least onesub-physical resource block pair and at least one physical resourceblock pair.

The base station provided in this embodiment of the present inventionmay be configured to execute technical solutions of the foregoing methodembodiments. Implementation principles and technical effects thereof aresimilar, and details are not described herein again.

FIG. 9 is a schematic structural diagram of Embodiment 2 of a basestation according to the present invention. As shown in FIG. 9 , thisembodiment is implemented on a basis of the embodiment shown in FIG. 8 ,and is specifically as follows:

Optionally, a length of a time domain occupied by the sub-physicalresource block pair is less than a length of a time domain occupied bythe first subframe, and the sub-physical resource block pair includes N1first subcarriers and M1 first orthogonal frequency divisionmultiplexing OFDM symbols, where a spacing between two adjacent firstsubcarriers in a frequency domain is greater than a set value, and bothN1 and M1 are positive integers.

Optionally, a length of a time domain occupied by the physical resourceblock pair is equal to a length of a time domain occupied by the secondsubframe, and the physical resource block pair includes N2 secondsubcarriers and M2 second OFDM symbols, where a spacing between twoadjacent second subcarriers in the frequency domain is equal to the setvalue, and both N2 and M2 are positive integers.

Optionally, N1 is equal to N2, and M1 is equal to M2.

Optionally, the at least one physical resource block pair in the thirdsubframe occupies a first frequency band, and the at least onesub-physical resource block pair in the third subframe occupies a secondfrequency band, where the first frequency band and the second frequencyband do not overlap.

Optionally, the base station 80 further includes a second sending module803, configured to send a subframe type indication to the UE before thefirst information is sent to the UE by using the downlink subframe,where the subframe type indication is used to indicate that the downlinksubframe is the first subframe, the second subframe, or the thirdsubframe.

Optionally, the base station 80 further includes a third sending module804, configured to: when the downlink subframe is the third subframe,send a frequency band indication to the UE before the first informationis sent to the UE by using the downlink subframe, where the frequencyband indication is used to indicate that the at least one physicalresource block pair occupies the first frequency band, and the at leastone sub-physical resource block pair occupies the second frequency band.

Optionally, the first sending module 802 is specifically configured to:

send the physical resource block pair on the first frequency band to theUE by using a first cyclic prefix CP length, where the physical resourceblock pair on the first frequency band carries the first information; or

send the sub-physical resource block pair on the second frequency bandto the UE by using a second CP length, where the sub-physical resourceblock pair on the second frequency band carries the first information,where

the first CP length is different from the second CP length.

Optionally, the first information includes:

control information for scheduling a downlink data channel and downlinkdata carried by the downlink data channel; or

control information for scheduling an uplink data channel.

Optionally, the control information for scheduling the downlink datachannel includes a resource allocation indication of the downlink datachannel, where the resource allocation indication of the downlink datachannel is used to indicate a location of the physical resource blockpair that is in the downlink subframe and that is allocated to the UEand a quantity of the physical resource block pairs, or the resourceallocation indication of the downlink data channel is used to indicate alocation of the sub-physical resource block pair that is in the downlinksubframe and that is allocated to the UE and a quantity of thesub-physical resource block pairs.

Alternatively, the control information for scheduling the uplink datachannel includes a resource allocation indication of the uplink datachannel, where the resource allocation indication of the uplink datachannel is used to indicate a location of the physical resource blockpair that is in an uplink subframe and that is allocated to the UE and aquantity of the physical resource block pairs, or the resourceallocation indication of the uplink data channel is used to indicate alocation of the sub-physical resource block pair that is in an uplinksubframe and that is allocated to the UE and a quantity of thesub-physical resource block pairs.

Optionally, the control information for scheduling the downlink datachannel further includes a modulation and coding scheme, where themodulation and coding scheme is used to indicate a transport block sizeof the downlink data channel; or

the control information for scheduling the uplink data channel furtherincludes a modulation and coding scheme, where the modulation and codingscheme is used to indicate a transport block size of the uplink datachannel.

The base station provided in this embodiment of the present inventionmay be configured to execute technical solutions of the foregoing methodembodiments. Implementation principles and technical effects thereof aresimilar, and details are not described herein again.

FIG. 10 is a schematic structural diagram of Embodiment 1 of userequipment 100 according to the present invention. As shown in FIG. 10 ,the user equipment 100 provided in this embodiment of the presentinvention includes a subframe determining module 1001 and a firstreceiving module 1002.

The subframe determining module 1001 is configured to determine adownlink subframe that carries first information and that is sent by abase station.

The first receiving module 1002 is configured to receive the firstinformation by using the downlink subframe.

The downlink subframe is any one of a first subframe, a second subframe,or a third subframe, where the first subframe includes at least twosub-physical resource block pairs, the second subframe includes at leasttwo physical resource block pairs, and the third subframe includes atleast one sub-physical resource block pair and at least one physicalresource block pair.

The user equipment provided in this embodiment of the present inventionmay be configured to execute technical solutions of the foregoing methodembodiments. Implementation principles and technical effects thereof aresimilar, and details are not described herein again.

FIG. 11 is a schematic structural diagram of Embodiment 2 of userequipment according to the present invention. As shown in FIG. 11 , thisembodiment of the present invention is implemented on a basis of theembodiment shown in FIG. 10 , and is specifically as follows:

Optionally, a length of a time domain occupied by the sub-physicalresource block pair is less than a length of a time domain occupied bythe first subframe, and the sub-physical resource block pair includes N1first subcarriers and M1 first orthogonal frequency divisionmultiplexing OFDM symbols, where a spacing between two adjacent firstsubcarriers in a frequency domain is greater than a set value, and bothN1 and M1 are positive integers.

Optionally, a length of a time domain occupied by the physical resourceblock pair is equal to a length of a time domain occupied by the secondsubframe, and the physical resource block pair includes N2 secondsubcarriers and M2 second OFDM symbols, where a spacing between twoadjacent second subcarriers in the frequency domain is equal to the setvalue, and both N2 and M2 are positive integers.

Optionally, N1 is equal to N2, and M1 is equal to M2.

Optionally, the at least one physical resource block pair in the thirdsubframe occupies a first frequency band, and the at least onesub-physical resource block pair in the third subframe occupies a secondfrequency band, where the first frequency band and the second frequencyband do not overlap.

Optionally, the subframe determining module 1001 is specificallyconfigured to:

receive a subframe type indication sent by the base station, where thesubframe type indication is used to indicate that the downlink subframeis the first subframe, the second subframe, or the third subframe.

Optionally, the user equipment 100 further includes a second receivingmodule 1003, configured to: when the downlink subframe is the thirdsubframe and before the first information is received by using thedownlink subframe, receive a frequency band indication sent by the basestation, where the frequency band indication is used to indicate thatthe at least one physical resource block pair occupies the firstfrequency band, and the at least one sub-physical resource block pairoccupies the second frequency band.

Optionally, the first receiving module 1002 is specifically configuredto:

receive the physical resource block pair that is on the first frequencyband and that is sent by the base station by using a first cyclic prefixCP length, where the physical resource block pair on the first frequencyband carries the first information; or

receive the sub-physical resource block pair that is on the secondfrequency band and that is sent by the base station by using a second CPlength, where the sub-physical resource block pair on the secondfrequency band carries the first information, where

the first CP length is different from the second CP length.

Optionally, the first information includes:

control information for scheduling a downlink data channel and downlinkdata carried by the downlink data channel; or

control information for scheduling an uplink data channel.

Optionally, the control information for scheduling the downlink datachannel includes a resource allocation indication of the downlink datachannel, where the resource allocation indication of the downlink datachannel is used to indicate a location of the physical resource blockpair that is in the downlink subframe and that is allocated to the UEand a quantity of the physical resource block pairs, or the resourceallocation indication of the downlink data channel is used to indicate alocation of the sub-physical resource block pair that is in the downlinksubframe and that is allocated to the UE and a quantity of thesub-physical resource block pairs.

Alternatively, the control information for scheduling the uplink datachannel includes a resource allocation indication of the uplink datachannel, where the resource allocation indication of the uplink datachannel is used to indicate a location of the physical resource blockpair that is in an uplink subframe and that is allocated to the UE and aquantity of the physical resource block pairs, or the resourceallocation indication of the uplink data channel is used to indicate alocation and a quantity of the sub-physical resource block pairs that isin an uplink subframe and that is allocated to the UE.

Optionally, the control information for scheduling the downlink datachannel further includes a modulation and coding scheme, where themodulation and coding scheme is used to indicate a transport block sizeof the downlink data channel; or

the control information for scheduling the uplink data channel furtherincludes a modulation and coding scheme, where the modulation and codingscheme is used to indicate a transport block size of the uplink datachannel.

The user equipment provided in this embodiment of the present inventionmay be configured to execute technical solutions of the foregoing methodembodiments. Implementation principles and technical effects thereof aresimilar, and details are not described herein again.

FIG. 12 is a schematic structural diagram of Embodiment 3 of a basestation 120 according to the present invention. As shown in FIG. 12 ,the base station 120 provided in this embodiment of the presentinvention includes an information determining module 1201 and a firstsending module 1202.

The information determining module 1201 is configured to determine ratematching information, and send the rate matching information to userequipment UE, where the rate matching information is used to indicate afirst time-frequency resource that is in a downlink subframe and thatdoes not need to be detected by the UE when the UE receives secondinformation by using the downlink subframe.

The first sending module 1202 is configured to determine the downlinksubframe according to the rate matching information, and send thedownlink subframe to the user equipment, where the downlink subframeincludes at least two subframes.

The base station provided in this embodiment of the present inventionmay be configured to execute technical solutions of the foregoing methodembodiments. Implementation principles and technical effects thereof aresimilar, and details are not described herein again.

FIG. 13 is a schematic structural diagram of Embodiment 4 of a basestation according to the present invention. As shown in FIG. 13 , thisembodiment of the present invention is implemented on a basis of theembodiment shown in FIG. 12 , and is specifically as follows:

Optionally, the first time-frequency resource includes alltime-frequency resources included in at least one subframe; or

the first time-frequency resource includes at least one of a physicalresource block, a sub-physical resource block, a physical resource blockpair, and a sub-physical resource block pair; or

the first time-frequency resource includes at least one of a resourceelement, a resource element group, and a control channel element; or

the first time-frequency resource includes a resource pattern of areference signal.

Optionally, a length of a time domain occupied by the sub-physicalresource block pair is less than a length of a time domain occupied byone subframe, and the sub-physical resource block pair includes N1 firstsubcarriers and M1 first orthogonal frequency division multiplexing OFDMsymbols, where a spacing between two adjacent first subcarriers in afrequency domain is greater than a set value, and both N1 and M1 arepositive integers.

Optionally, a length of a time domain occupied by the physical resourceblock pair is equal to a length of a time domain occupied by onesubframe, and the physical resource block pair includes N2 secondsubcarriers and M2 second OFDM symbols, where a spacing between twoadjacent second subcarriers in the frequency domain is equal to the setvalue, and both N2 and M2 are positive integers.

Optionally, N1 is equal to N2, and M1 is equal to M2.

Optionally, the physical resource block pair occupies a first frequencyband, and the sub-physical resource block pair occupies a secondfrequency band, where the first frequency band and the second frequencyband do not overlap.

Optionally, the first sending module 1202 is specifically configured to:

send the rate matching information to the UE by using layer 1 signalingor layer 2 signaling.

Optionally, a downlink subframe corresponding to the firsttime-frequency resource is a paging subframe or a synchronization signalsending subframe.

Optionally, the base station 120 further includes a configuration module1203, configured to send a configuration message to the UE, where theconfiguration message includes at least one of uplink schedulinginformation, uplink power control information, and periodic uplinksignal configuration information, and the configuration message is usedto instruct the UE to send an uplink signal in an uplink subframeaccording to the configuration message, where the uplink subframe is anuplink subframe corresponding to the downlink subframe in which thefirst time-frequency resource is located.

The base station provided in this embodiment of the present inventionmay be configured to execute technical solutions of the foregoing methodembodiments. Implementation principles and technical effects thereof aresimilar, and details are not described herein again.

FIG. 14 is a schematic structural diagram of Embodiment 3 of userequipment 140 according to the present invention. As shown in FIG. 14 ,the user equipment 140 provided in this embodiment of the presentinvention includes a first receiving module 1401 and a second receivingmodule 1402.

The first receiving module 1401 is configured to receive rate matchinginformation sent by a base station, where the rate matching informationis used to indicate a first time-frequency resource that is in adownlink subframe and that does not need to be detected by the UE whenthe UE receives second information by using the downlink subframe.

The second receiving module 1402 is configured to receive, according tothe rate matching information, the second information carried in thedownlink subframe, where the downlink subframe includes at least twosubframes.

The user equipment provided in this embodiment of the present inventionmay be configured to execute technical solutions of the foregoing methodembodiments. Implementation principles and technical effects thereof aresimilar, and details are not described herein again.

FIG. 15 is a schematic structural diagram of Embodiment 4 of userequipment according to the present invention. As shown in FIG. 15 , thisembodiment of the present invention is implemented on a basis of theembodiment shown in FIG. 14 , and is specifically as follows:

Optionally, the first time-frequency resource includes alltime-frequency resources included in at least one subframe; or

the first time-frequency resource includes at least one of a physicalresource block, a sub-physical resource block, a physical resource blockpair, and a sub-physical resource block pair; or

the first time-frequency resource includes at least one of a resourceelement, a resource element group, and a control channel element; or

the first time-frequency resource includes a resource pattern of areference signal.

Optionally, a length of a time domain occupied by the sub-physicalresource block pair is less than a length of a time domain occupied byone subframe, and the sub-physical resource block pair includes N1 firstsubcarriers and M1 first orthogonal frequency division multiplexing OFDMsymbols, where a spacing between two adjacent first subcarriers in afrequency domain is greater than a set value, and both N1 and M1 arepositive integers.

Optionally, a length of a time domain occupied by the physical resourceblock pair is equal to a length of a time domain occupied by onesubframe, and the physical resource block pair includes N2 secondsubcarriers and M2 second OFDM symbols, where a spacing between twoadjacent second subcarriers in the frequency domain is equal to the setvalue, and both N2 and M2 are positive integers.

Optionally, N1 is equal to N2, and M1 is equal to M2.

Optionally, the physical resource block pair occupies a first frequencyband, and the sub-physical resource block pair occupies a secondfrequency band, where the first frequency band and the second frequencyband do not overlap.

Optionally, the first receiving module 1401 is specifically configuredto:

receive, by using layer 1 signaling or layer 2 signaling, the ratematching information sent by the base station.

Optionally, a downlink subframe corresponding to the firsttime-frequency resource is a paging subframe or a synchronization signalsending subframe.

Optionally, the user equipment 140 further includes:

a third receiving module 1403, configured to receive a configurationmessage sent by the base station, where the configuration messageincludes at least one of uplink scheduling information, uplink powercontrol information, and periodic uplink signal configurationinformation; and

a sending module 1404, configured to send an uplink signal in an uplinksubframe according to the configuration message, where the uplinksubframe is an uplink subframe corresponding to the downlink subframe inwhich the first time-frequency resource is located.

The user equipment provided in this embodiment of the present inventionmay be configured to execute technical solutions of the foregoing methodembodiments. Implementation principles and technical effects thereof aresimilar, and details are not described herein again.

FIG. 16 is a schematic structural diagram of Embodiment 5 of a basestation 160 according to the present invention. As shown in FIG. 16 ,the base station 160 provided in this embodiment includes a processor1601 and a memory 1602. The base station 160 may further include atransmitter 1603 and a receiver 1604. The transmitter 1603 and thereceiver 1604 may be connected to the processor 1601, where thetransmitter 1603 is configured to send data or information, the receiver1604 is configured to receive the data or the information, and thememory 1602 stores an execution instruction; when the base station 160runs, the processor 1601 communicates with the memory 1602, and theprocessor 1601 invokes the execution instruction in the memory 1602 toperform the following operations:

determining, by the base station, a downlink subframe that is used tosend first information to user equipment UE; and

sending, by the base station, the first information to the UE by usingthe downlink subframe, where

the downlink subframe is a first subframe, a second subframe, or a thirdsubframe, where the first subframe includes at least two sub-physicalresource block pairs, the second subframe includes at least two physicalresource block pairs, and the third subframe includes at least onesub-physical resource block pair and at least one physical resourceblock pair.

Optionally, a length of a time domain occupied by the sub-physicalresource block pair is less than a length of a time domain occupied bythe first subframe, and the sub-physical resource block pair includes N1first subcarriers and M1 first orthogonal frequency divisionmultiplexing OFDM symbols, where a spacing between two adjacent firstsubcarriers in a frequency domain is greater than a set value, and bothN1 and M1 are positive integers.

Optionally, a length of a time domain occupied by the physical resourceblock pair is equal to a length of a time domain occupied by the secondsubframe, and the physical resource block pair includes N2 secondsubcarriers and M2 second OFDM symbols, where a spacing between twoadjacent second subcarriers in the frequency domain is equal to the setvalue, and both N2 and M2 are positive integers.

Optionally, N1 is equal to N2, and M1 is equal to M2.

Optionally, the at least one physical resource block pair in the thirdsubframe occupies a first frequency band, and the at least onesub-physical resource block pair in the third subframe occupies a secondfrequency band, where the first frequency band and the second frequencyband do not overlap.

Optionally, before the sending, by the base station, the firstinformation to the UE by using the downlink subframe, the followingoperation is further included:

sending, by the base station, a subframe type indication to the UE,where the subframe type indication is used to indicate that the downlinksubframe is the first subframe, the second subframe, or the thirdsubframe.

Optionally, when the downlink subframe is the third subframe, before thesending, by the base station, the first information to the UE by usingthe downlink subframe, the following operation is further included:

sending, by the base station, a frequency band indication to the UE,where the frequency band indication is used to indicate that the atleast one physical resource block pair occupies the first frequencyband, and the at least one sub-physical resource block pair occupies thesecond frequency band.

Optionally, the sending, by the base station, the first information tothe UE by using the downlink subframe includes:

sending, by the base station, the physical resource block pair on thefirst frequency band to the UE by using a first cyclic prefix CP length,where the physical resource block pair on the first frequency bandcarries the first information; or

sending, by the base station, the sub-physical resource block pair onthe second frequency band to the UE by using a second CP length, wherethe sub-physical resource block pair on the second frequency bandcarries the first information, where the first CP length is differentfrom the second CP length.

Optionally, the first information includes:

control information for scheduling a downlink data channel and downlinkdata carried by the downlink data channel; or

control information for scheduling an uplink data channel.

Optionally, the control information for scheduling the downlink datachannel includes a resource allocation indication of the downlink datachannel, where the resource allocation indication of the downlink datachannel is used to indicate a location of the physical resource blockpair that is in the downlink subframe and that is allocated to the UEand a quantity of the physical resource block pairs, or the resourceallocation indication of the downlink data channel is used to indicate alocation of the sub-physical resource block pair that is in the downlinksubframe and that is allocated to the UE and a quantity of thesub-physical resource block pairs.

Alternatively, the control information for scheduling the uplink datachannel includes a resource allocation indication of the uplink datachannel, where the resource allocation indication of the uplink datachannel is used to indicate a location of the physical resource blockpair that is in an uplink subframe and that is allocated to the UE and aquantity of the physical resource block pairs, or the resourceallocation indication of the uplink data channel is used to indicate alocation of the sub-physical resource block pair that is in an uplinksubframe and that is allocated to the UE and a quantity of thesub-physical resource block pairs.

Optionally, the control information for scheduling the downlink datachannel further includes a modulation and coding scheme, where themodulation and coding scheme is used to indicate a transport block sizeof the downlink data channel; or

the control information for scheduling the uplink data channel furtherincludes a modulation and coding scheme, where the modulation and codingscheme is used to indicate a transport block size of the uplink datachannel.

The base station provided in this embodiment of the present inventionmay be configured to execute technical solutions of the foregoing methodembodiments. Implementation principles and technical effects thereof aresimilar, and details are not described herein again.

FIG. 17 is a schematic structural diagram of Embodiment 5 of userequipment 170 according to the present invention. As shown in FIG. 17 ,the user equipment 170 provided in this embodiment includes a processor1701 and a memory 1702. The user equipment 170 may further include atransmitter 1703 and a receiver 1704. The transmitter 1703 and thereceiver 1704 may be connected to the processor 1701, where thetransmitter 1703 is configured to send data or information, the receiver1704 is configured to receive the data or the information, and thememory 1702 stores an execution instruction; when the user equipment 170runs, the processor 1701 communicates with the memory 1702, and theprocessor 1701 invokes the execution instruction in the memory 1702 toperform the following operations:

determining, by the user equipment UE, a downlink subframe that carriesfirst information and that is sent by a base station; and

receiving, by the UE, the first information by using the downlinksubframe, where

the downlink subframe is any one of a first subframe, a second subframe,or a third subframe, where the first subframe includes at least twosub-physical resource block pairs, the second subframe includes at leasttwo physical resource block pairs, and the third subframe includes atleast one sub-physical resource block pair and at least one physicalresource block pair.

Optionally, a length of a time domain occupied by the sub-physicalresource block pair is less than a length of a time domain occupied bythe first subframe, and the sub-physical resource block pair includes N1first subcarriers and M1 first orthogonal frequency divisionmultiplexing OFDM symbols, where a spacing between two adjacent firstsubcarriers in a frequency domain is greater than a set value, and bothN1 and M1 are positive integers.

Optionally, a length of a time domain occupied by the physical resourceblock pair is equal to a length of a time domain occupied by the secondsubframe, and the physical resource block pair includes N2 secondsubcarriers and M2 second OFDM symbols, where a spacing between twoadjacent second subcarriers in the frequency domain is equal to the setvalue, and both N2 and M2 are positive integers.

Optionally, N1 is equal to N2, and M1 is equal to M2.

Optionally, the at least one physical resource block pair in the thirdsubframe occupies a first frequency band, and the at least onesub-physical resource block pair in the third subframe occupies a secondfrequency band, where the first frequency band and the second frequencyband do not overlap.

Optionally, the determining, by the UE, a downlink subframe that carriesfirst information and that is sent by a base station includes:

receiving, by the UE, a subframe type indication sent by the basestation, where the subframe type indication is used to indicate that thedownlink subframe is the first subframe, the second subframe, or thethird subframe.

Optionally, when the downlink subframe is the third subframe, before thereceiving, by the UE, the first information by using the downlinksubframe, the following operation is further included:

receiving, by the UE, a frequency band indication sent by the basestation, where the frequency band indication is used to indicate thatthe at least one physical resource block pair occupies the firstfrequency band, and the at least one sub-physical resource block pairoccupies the second frequency band.

Optionally, the receiving, by the UE, the first information by using thedownlink subframe includes:

receiving, by the UE, the physical resource block pair that is on thefirst frequency band and that is sent by the base station by using afirst cyclic prefix CP length, where the physical resource block pair onthe first frequency band carries the first information; or

receiving, by the UE, the sub-physical resource block pair that is onthe second frequency band and that is sent by the base station by usinga second CP length, where the sub-physical resource block pair on thesecond frequency band carries the first information, where the first CPlength is different from the second CP length.

Optionally, the first information includes:

control information for scheduling a downlink data channel and downlinkdata carried by the downlink data channel; or

control information for scheduling an uplink data channel.

Optionally, the control information for scheduling the downlink datachannel includes a resource allocation indication of the downlink datachannel, where the resource allocation indication of the downlink datachannel is used to indicate a location of the physical resource blockpair that is in the downlink subframe and that is allocated to the UEand a quantity of the physical resource block pairs, or the resourceallocation indication of the downlink data channel is used to indicate alocation of the sub-physical resource block pair that is in the downlinksubframe and that is allocated to the UE and a quantity of thesub-physical resource block pairs.

Alternatively, the control information for scheduling the uplink datachannel includes a resource allocation indication of the uplink datachannel, where the resource allocation indication of the uplink datachannel is used to indicate a location of the physical resource blockpair that is in an uplink subframe and that is allocated to the UE and aquantity of the physical resource block pairs, or the resourceallocation indication of the uplink data channel is used to indicate alocation and a quantity of the sub-physical resource block pairs that isin an uplink subframe and that is allocated to the UE.

Optionally, the control information for scheduling the downlink datachannel further includes a modulation and coding scheme, where themodulation and coding scheme is used to indicate a transport block sizeof the downlink data channel; or

the control information for scheduling the uplink data channel furtherincludes a modulation and coding scheme, where the modulation and codingscheme is used to indicate a transport block size of the uplink datachannel.

The user equipment provided in this embodiment of the present inventionmay be configured to execute technical solutions of the foregoing methodembodiments. Implementation principles and technical effects thereof aresimilar, and details are not described herein again.

FIG. 18 is a schematic structural diagram of Embodiment 6 of a basestation 180 according to the present invention. The base station 180provided in this embodiment includes a processor 1801 and a memory 1802.The base station 180 may further include a transmitter 1803 and areceiver 1804. The transmitter 1803 and the receiver 1804 may beconnected to the processor 1801, where the transmitter 1803 isconfigured to send data or information, the receiver 1804 is configuredto receive the data or the information, and the memory 1802 stores anexecution instruction; when the base station 180 runs, the processor1801 communicates with the memory 1802, and the processor 1801 invokesthe execution instruction in the memory 1802 to perform the followingoperations:

determining, by the base station, rate matching information, and sendingthe rate matching information to user equipment UE, where the ratematching information is used to indicate a first time-frequency resourcethat is in a downlink subframe and that does not need to be detected bythe UE when the UE receives second information by using the downlinksubframe; and

determining, by the base station, the downlink subframe according to therate matching information, and sending the downlink subframe to the userequipment, where the downlink subframe includes at least two subframes.

Optionally, the first time-frequency resource includes alltime-frequency resources included in at least one subframe; or

the first time-frequency resource includes at least one of a physicalresource block, a sub-physical resource block, a physical resource blockpair, and a sub-physical resource block pair; or

the first time-frequency resource includes at least one of a resourceelement, a resource element group, and a control channel element; or

the first time-frequency resource includes a resource pattern of areference signal.

Optionally, a length of a time domain occupied by the sub-physicalresource block pair is less than a length of a time domain occupied byone subframe, and the sub-physical resource block pair includes N1 firstsubcarriers and M1 first orthogonal frequency division multiplexing OFDMsymbols, where a spacing between two adjacent first subcarriers in afrequency domain is greater than a set value, and both N1 and M1 arepositive integers.

Optionally, a length of a time domain occupied by the physical resourceblock pair is equal to a length of a time domain occupied by onesubframe, and the physical resource block pair includes N2 secondsubcarriers and M2 second OFDM symbols, where a spacing between twoadjacent second subcarriers in the frequency domain is equal to the setvalue, and both N2 and M2 are positive integers.

Optionally, N1 is equal to N2, and M1 is equal to M2.

Optionally, the physical resource block pair occupies a first frequencyband, and the sub-physical resource block pair occupies a secondfrequency band, where the first frequency band and the second frequencyband do not overlap.

Optionally, the sending, by the base station, the rate matchinginformation to user equipment UE includes:

sending, by the base station, the rate matching information to the UE byusing layer 1 signaling or layer 2 signaling.

Optionally, a downlink subframe corresponding to the firsttime-frequency resource is a paging subframe or a synchronization signalsending subframe.

Optionally, the following operation is further included:

sending, by the base station, a configuration message to the UE, wherethe configuration message includes at least one of uplink schedulinginformation, uplink power control information, and periodic uplinksignal configuration information, and the configuration message is usedto instruct the UE to send an uplink signal in an uplink subframeaccording to the configuration message, where the uplink subframe is anuplink subframe corresponding to the downlink subframe in which thefirst time-frequency resource is located.

The base station provided in this embodiment of the present inventionmay be configured to execute technical solutions of the foregoing methodembodiments. Implementation principles and technical effects thereof aresimilar, and details are not described herein again.

FIG. 19 is a schematic structural diagram of Embodiment 6 of userequipment 190 according to the present invention. As shown in FIG. 19 ,the user equipment 190 provided in this embodiment includes a processor1901 and a memory 1902. The user equipment 190 may further include atransmitter 1903 and a receiver 1904. The transmitter 1903 and thereceiver 1904 may be connected to the processor 1901, where thetransmitter 1903 is configured to send data or information, the receiver1904 is configured to receive the data or the information, and thememory 1902 stores an execution instruction; when the user equipment 190runs, the processor 1901 communicates with the memory 1902, and theprocessor 1901 invokes the execution instruction in the memory 1902 toperform the following operations:

receiving, by the user equipment UE, rate matching information sent by abase station, where the rate matching information is used to indicate afirst time-frequency resource that is in a downlink subframe and thatdoes not need to be detected by the UE when the UE receives secondinformation by using the downlink subframe; and

receiving, by the UE according to the rate matching information, thesecond information carried in the downlink subframe, where the downlinksubframe includes at least two subframes.

Optionally, the first time-frequency resource includes alltime-frequency resources included in at least one subframe; or

the first time-frequency resource includes at least one of a physicalresource block, a sub-physical resource block, a physical resource blockpair, and a sub-physical resource block pair; or

the first time-frequency resource includes at least one of a resourceelement, a resource element group, and a control channel element; or

the first time-frequency resource includes a resource pattern of areference signal.

Optionally, a length of a time domain occupied by the sub-physicalresource block pair is less than a length of a time domain occupied byone subframe, and the sub-physical resource block pair includes N1 firstsubcarriers and M1 first orthogonal frequency division multiplexing OFDMsymbols, where a spacing between two adjacent first subcarriers in afrequency domain is greater than a set value, and both N1 and M1 arepositive integers.

Optionally, a length of a time domain occupied by the physical resourceblock pair is equal to a length of a time domain occupied by onesubframe, and the physical resource block pair includes N2 secondsubcarriers and M2 second OFDM symbols, where a spacing between twoadjacent second subcarriers in the frequency domain is equal to the setvalue, and both N2 and M2 are positive integers.

Optionally, N1 is equal to N2, and M1 is equal to M2.

Optionally, the physical resource block pair occupies a first frequencyband, and the sub-physical resource block pair occupies a secondfrequency band, where the first frequency band and the second frequencyband do not overlap.

Optionally, the receiving, by the user equipment UE, rate matchinginformation sent by a base station includes:

receiving, by the UE by using layer 1 signaling or layer 2 signaling,the rate matching information sent by the base station.

Optionally, a downlink subframe corresponding to the firsttime-frequency resource is a paging subframe or a synchronization signalsending subframe.

Optionally, the following operation is further included:

receiving, by the UE, a configuration message sent by the base station,where the configuration message includes at least one of uplinkscheduling information, uplink power control information, and periodicuplink signal configuration information; and

sending, by the UE, an uplink signal in an uplink subframe according tothe configuration message, where the uplink subframe is an uplinksubframe corresponding to the downlink subframe in which the firsttime-frequency resource is located.

The user equipment provided in this embodiment of the present inventionmay be configured to execute technical solutions of the foregoing methodembodiments. Implementation principles and technical effects thereof aresimilar, and details are not described herein again.

Persons of ordinary skill in the art may understand that all or some ofthe steps of the method embodiments may be implemented by hardwarerelated to a program instruction. The foregoing program may be stored ina computer-readable storage medium. When the program runs, the steps ofthe method embodiments are performed. The foregoing storage mediumincludes: any medium that can store program code, such as a ROM, a RAM,a magnetic disk, or an optical disc.

Finally, it should be noted that the foregoing embodiments are merelyintended for describing the technical solutions of the presentinvention, but not for limiting the present invention. Although thepresent invention is described in detail with reference to the foregoingembodiments, persons of ordinary skill in the art should understand thatthey may still make modifications to the technical solutions describedin the foregoing embodiments or make equivalent replacements to some orall technical features thereof, without departing from the scope of thetechnical solutions of the embodiments of the present invention.

What is claimed is:
 1. An information sending method, comprising:sending, by a base station, a frequency band indication to a userequipment (UE), where the frequency band indication indicates that afirst physical resource block occupies a first frequency band and asecond physical resource block occupies a second frequency band;sending, by the base station, first information to the UE by using atleast one of the first physical resource block or the second physicalresource block, wherein the first physical resource block comprises N1first subcarriers, a spacing between two adjacent first subcarriers in afrequency domain is greater than a set value, and N1 is positiveinteger; and the second physical resource block comprises N2 secondsubcarriers, a spacing between two adjacent second subcarriers in thefrequency domain is equal to the set value, and N2 is positive integer.2. The method according to claim 1, wherein N1=12 and N2=12.
 3. Themethod according to claim 2, wherein the set value is 15 KHz.
 4. Themethod according to claim 3, wherein, the sending, by the base station,first information to the UE by using at least one of the first physicalresource block or the second physical resource block comprises: sending,by the base station, the first information to the UE by using the firstphysical resource block with a first cyclic prefix (CP) length; orsending, by the base station, the first information to the UE by usingthe second physical resource block with a second CP length; wherein thefirst CP length is different than the second CP length.
 5. Aninformation receiving method, comprising: receiving, by a user equipment(UE), a frequency band indication sent by a base station, where thefrequency band indication indicates that a first physical resource blockoccupies a first frequency band and a second physical resource blockoccupies a second frequency band; receiving, by the UE, firstinformation by using at least one of the first physical resource blockor the second physical resource block, wherein the first physicalresource block comprises N1 first subcarriers, a spacing between twoadjacent first subcarriers in a frequency domain is greater than a setvalue, and N1 is positive integer; and the second physical resourceblock comprises N2 second subcarriers, a spacing between two adjacentsecond subcarriers in the frequency domain is equal to the set value,and N2 is positive integer.
 6. The method according to claim 5, whereinN1=12 and N2=12.
 7. The method according to claim 6, wherein the setvalue is 15 KHz.
 8. The method according to claim 7, wherein, thereceiving, by the UE, first information by using at least one of thefirst physical resource block or the second physical resource blockcomprises: receiving, by the UE, the first information by using thefirst physical resource block from the base station with a first cyclicprefix (CP) length; or receiving, by the UE, the first information byusing the second physical resource block from the base station with asecond CP length; wherein the first CP length is different than thesecond CP length.
 9. A device, comprising: a transmitter; at least oneprocessor; and one or more memories coupled to the at least oneprocessor and storing programming instructions for execution by the atleast one processor to cause the device to: send a frequency bandindication through the transmitter to a user equipment (UE), where thefrequency band indication indicates that a first physical resource blockoccupies a first frequency band and a second physical resource blockoccupies a second frequency band; send first information to the UEthrough the transmitter by using at least one of the first physicalresource block or the second physical resource block, wherein the firstphysical resource block comprises N1 first subcarriers, a spacingbetween two adjacent first subcarriers in a frequency domain is greaterthan a set value, and N1 is positive integer; and the second physicalresource block comprises N2 second subcarriers, a spacing between twoadjacent second subcarriers in the frequency domain is equal to the setvalue, and N2 is positive integer.
 10. The device according to claim 9,wherein N1=12 and N2=12.
 11. The device according to claim 10, whereinthe set value is 15 KHz.
 12. The device according to claim 11, whereinthe programming instructions, when executed by the at least oneprocessor, cause the device to: send the first information to the UEthrough the transmitter by using the first physical resource block witha first cyclic prefix (CP) length or using the second physical resourceblock with a second CP length; wherein the first CP length is differentthan the second CP length.
 13. A device, comprising: a receiver; atleast one processor; and one or more memories coupled to the at leastone processor and storing programming instructions for execution by theat least one processor to cause the device to: receive a frequency bandindication through the receiver from a base station, where the frequencyband indication indicates that a first physical resource block occupiesa first frequency band and a second physical resource block occupies asecond frequency band; receive first information through the receiver byusing at least one of the first physical resource block or the secondphysical resource block, wherein the first physical resource blockcomprises N1 first subcarriers, a spacing between two adjacent firstsubcarriers in a frequency domain is greater than a set value, and N1 ispositive integer; and the second physical resource block comprises N2second subcarriers, a spacing between two adjacent second subcarriers inthe frequency domain is equal to the set value, and N2 is positiveinteger.
 14. The device according to claim 13, wherein N1=12 and N2=12.15. The device according to claim 14, wherein the set value is 15 KHz.16. The device according to claim 15, wherein the programminginstructions, when executed by the at least one processor, cause thedevice to: receive the first information through the receiver by usingthe first physical resource block from the base station with a firstcyclic prefix (CP) length or using the second physical resource blockfrom the base station with a second CP length; wherein the first CPlength is different than the second CP length.
 17. A non-transitorycomputer-readable media storing computer instructions for sendinginformation, that when executed by one or more processors, cause the oneor more processors to perform: sending a frequency band indication to auser equipment (UE), where the frequency band indication indicates thata first physical resource block occupies a first frequency band and asecond physical resource block occupies a second frequency band; sendingfirst information through a transmitter to the UE by using at least oneof the first physical resource block or the second physical resourceblock, wherein the first physical resource block comprises N1 firstsubcarriers, a spacing between two adjacent first subcarriers in afrequency domain is greater than a set value, and N1 is positiveinteger; and the second physical resource block comprises N2 secondsubcarriers, a spacing between two adjacent second subcarriers in thefrequency domain is equal to the set value, and N2 is positive integer.18. The non-transitory computer-readable media according to claim 17,wherein N1=12 and N2=12.
 19. The non-transitory computer-readable mediaaccording to claim 18, wherein the set value is 15 KHz.
 20. Thenon-transitory computer-readable media according to claim 19, wherein,the sending first information through a transmitter to the UE by usingat least one of the first physical resource block or the second physicalresource block comprises: sending the first information through atransmitter to the UE by using the first physical resource block with afirst cyclic prefix (CP) length; or sending the first informationthrough a transmitter to the UE by using the second physical resourceblock with a second CP length; wherein the first CP length is differentthan the second CP length.
 21. A non-transitory computer-readable mediastoring computer instructions for sending information, that whenexecuted by one or more processors, cause the one or more processors toperform: receiving a frequency band indication sent by a base station,where the frequency band indication indicates that a first physicalresource block occupies a first frequency band and a second physicalresource block occupies a second frequency band; receiving firstinformation through a receiver by using at least one of the firstphysical resource block or the second physical resource block, whereinthe first physical resource block comprises N1 first subcarriers, aspacing between two adjacent first subcarriers in a frequency domain isgreater than a set value, and N1 is positive integer; and the secondphysical resource block comprises N2 second subcarriers, a spacingbetween two adjacent second subcarriers in the frequency domain is equalto the set value, and N2 is positive integer.
 22. The non-transitorycomputer-readable media according to claim 21, wherein N1=12 and N2=12.23. The non-transitory computer-readable media according to claim 22,wherein the set value is 15 KHz.
 24. The non-transitorycomputer-readable media according to claim 23, wherein, the receivingfirst information through a receiver by using at least one of the firstphysical resource block or the second physical resource block comprises:receiving the first information through a receiver by using the firstphysical resource block from the base station with a first cyclic prefix(CP) length; or receiving the first information through a receiver byusing the second physical resource block from the base station with asecond CP length; wherein the first CP length is different than thesecond CP length.